# Dictionary Definition

one adj

2 particular but unspecified; "early one evening"
[syn: one(a)]

3 having the indivisible character of a unit; "a
unitary action"; "spoke with one voice" [syn: one(a), unitary]

4 of the same kind or quality; "two animals of
one species" [syn: one(a)]

5 used informally as an intensifier; "that is one
fine dog" [syn: one(a)]

6 indefinite in time or position; "he will come
one day"; "one place or another" [syn: one(a)]

7 being the single appropriate individual of a
kind; only; "the one horse that could win this race"; "the one
person I could marry" [syn: one(a)]

8 being one in number--a single unit or thing;
"one person is going"; "her one thought was to win"; "I'm just one
player on the team"; "one day is just like the next"; "seen one
horse and you've seen them all" [syn: one(a)]

9 being a single entity made by combining
separate components; "three chemicals combining into one
solution"

10 eminent beyond or above comparison; "matchless
beauty"; "the team's nonpareil center fielder"; "she's one girl in
a million"; "the one and only Muhammad Ali"; "a peerless scholar";
"infamy unmatched in the Western world"; "wrote with unmatchable
clarity"; "unrivaled mastery of her art" [syn: matchless, nonpareil, one(a), one and
only(a), peerless,
unmatched, unmatchable, unrivaled, unrivalled]

### Noun

1 the smallest whole number or a numeral
representing this number; "he has the one but will need a two and
three to go with it"; "they had lunch at one" [syn: 1, I, ace, single, unity]

2 a single person or thing; "he is the best one";
"this is the one I ordered"

# User Contributed Dictionary

## English

### Etymology

From an (same word as an), from , from . Cognate with German ein, Dutch een/één, French un, Russian один.### Pronunciation

rfp Australian English requested### Cardinal number

- The first number in the set of natural
numbers (especially in number
theory); the cardinality of the smallest
nonempty set.
- There is only one Earth.
- In Western culture, a baby turns one year old a year after its birth.
- One person, one vote.

- Arabic numerals: 1
- Chinese numerals: 一, 壹
- Greek numerals: A', α'
- Hindi numerals: १
- Roman numerals: I
- Binary:
1
- Next: 10

- Hexadecimal: 1

- The ordinality of an element which has no predecessor, usually called first or number one.
- Describing a set or group with one component.

#### Usage notes

#### Translations

first number

- Afrikaans: een
- Ainu: シネ (shine)
- Aka-Be-ada: u:batu:l
- Akkadian: ishten
- Albanian: një
- Alsatian: eins
- American Sign Language: * trreq Amharic: (numeral: ፩)
- Arabic: (numeral: )
- Aramaic:
- Arapaho: jaasaaye
- Armenian: մեկ
(mek)
- Classical Armenian: me

- Assamese: এক (eka)
- Asturian: ún
- Avestan: aeva
- Aymara: maya
- Azeri: (bir)
- Basque: bat
- Bavarian: oans
- Belarusian: адзін
- Bemba: cimo
- Bengali: (eka) (numeral:)
- Blackfoot: nĭtukskûm
- Bolognese: ón
- Bosnian: jedan
- Breton: unan
- trreq Burmese: (numeral: ၁)
- Burushashki: hin
- Cabecar: etku
- Calabrese: unu
- Carib: o:wiñ
- Catalan: un
- Cayapa: main
- Cebuano: usa
- Chamorro: unu
- Cherokee: ᏌᏊᎢ (saquui)
- Cheyenne:
- Chibcha: ata
- Chinese:
- Chimú: onäk
- Choctaw: ačǎfa
- Chorti: inte'
- Chukchi: -nnen
- Coche: kanži
- Colorado: mã, mãka
- Comanche:
- Cornish: un, onen
- Corsican: unu
- Cree: pâyuk
- Crimean Tatar: bir
- Croatian: jedan
- Czech: jeden
- Danish: én, et
- Dena'ina: ts'ełq'i
- Drehu: caas
- Dutch: één, een
- Egyptian: w-'-w
- Ekegusii: eyemo
- Erzya: вейке (vejke)
- Esperanto: unu
- Etruscan: thu
- Estonian: üks
- Faroese: eitt
- Fijian: dua
- Finnish: yksi
- Fore: kánoné
- Frankish: anne
- French: un
- West Frisian: ien
- Ga: ekome
- Gagauz: bir
- Galician: un
- Gamilaraay: maal
- Garífuna: aban
- Gascon: iva
- Gaulish: oinos
- Georgian: ერთი (erti)
- German: italbrac abstract counting: eins, italbrac counting objects: ein, eine, einen, einem, einer, eines
- Gilbertese: teuana
- Gilyak (Nivkh): nin
- Gothic: áins
- Greek: ένας
- Classical Greek: εἷς
- Mycenean Greek: hemei

- Guaraní: peteï
- Gujarati: એકડો (ekaddo) (numeral: ૧)
- Haida: sgoansiñ
- Haitian Creole: en, youn
- Hausa: gùdáá, ɗáyá
- Hawaiian: (var: kahi)
- Hebrew: אַחַת (ákhat) italbrac used in counting, אֶחָד (ékhad)
- Hiligaynon: isa
- Hindi: एक (ek) (numeral: १)
- Hungarian: egy
- Hupa:
- Ibo: otu
- Icelandic: einn
- Indonesian: satu
- Ido: un
- Interlingua: un
- Irish: aon, amháin
- Iroquoian:
- Italian: uno
- Japanese: 一 (いち, ichí), 一つ (ひとつ, hitótsu)
- Javanese: siji, setunggal
- Old Javanese: tunggul

- Jersey: ieune
- Kalaallisut: ataaseq
- trreq Kannada: (numeral: ೧)
- Karajá: sohoji
- Karelian: yksi
- Kazakh: бір
- Khmer: (muoy) (numeral: )
- Kinyarwanda: rimwe
- Klallam:
- Komi: (ötïk)
- Kongo: mosi
- Korean: 하나 (hana), 한 (han) qualifier adjective, 일 (一, il)
- Kurdish: yek, êk,
- Kyrgyz: бир (bir)
- Lakota: ; wana
- trreq Lao: (numeral: )
- Latin: unus
- Latvian: viens
- Lithuanian: vienas, viena
- Livonian: ikš
- Lojban: pa
- Lombardo: vun , vuna
- Low Saxon: een
- Luganda: emu
- Luxembourgish: een
- Malagasy: iray
- trreq Malayalam: (numeral: ൧)
- Maltese: wieħed
- Manchu: emu
- Manx: 'nane, un, unnane
- Mari: икыт (ikyt)
- Maori: tahi
- Mapuche: kiñe
- Marathi: एक (eka) (numeral: १)
- Masaai: nabo
- Maricopa: shenthik
- Marshallese: juon
- Mi'kmaq: nāookt
- Minangkabau: ciek
- Miwok: kenne
- Mohawk: énska
- Moldovan: уну
- Mongolian: нэг (neg), (nigen) (numeral: ᠑)
- Mundari: mid
- Mundurukú:
- Nahuatl: ce
- Nauruan: aiquen
- Navajo: láa'ii
- Nengone: sa
- Nivkh (Gilyak): nin
- Normand: eun
- Norwegian:
- Novial: un
- Occitan: un
- Ojibwe: bezhig
- Ok: pau
- Old Church Slavonic: (jedinŭ)
- Old English: an
- Old Germanic: ainaz
- Old Icelandic: einn
- Old Irish: óen
- Old Norse: einn
- Old Nubian: ouer-
- Old Prussian: ains
- Old Tupi: oîepé
- Oriya: ଏକ (ek) (numeral: ୧)
- Oscan: uinus
- Ossetian: иу (iu)
- Pahlavi:
- Pali: eka
- Papago (O'odham): hemako
- Pashto: (numeral:)
- Persian: (yek) (numeral:)
- Phoenician: '-h -d
- Polish: jeden
- Portuguese: um
- Prakrit: ekko
- Proto-Algonquian: nekotwi
- Proto-Austronesian: isa
- Proto-Bantu-X: -mó
- Proto-Berber: yn
- Proto-Dravidian: oru
- Proto-Eastern:
- Proto-Eskimo: ataRuciR
- Proto-Finno-Ugric: ykte
- Proto-Indo-European: oynos, sem
- Proto-Mayan: xun
- Proto-Miwok: ken.e
- Proto-Quechua: suk
- Proto-Uto-Aztecan: simayv
- Provençal: un
- Pugliese: nu
- Punjabi: ਇੱਕ (ika) (numeral: ੧)
- Québécois (Canadian French): un
- Quechua (Ecuador): shuc
- Rapanui: ka tahi
- Rarotongan:
- Rohingya: ek
- Romani: yek
- Romanian: unu
- Roviana: keke
- Russian: один, раз italbrac when counting
- Saami: okta
- Samoan: tasi (var: asi)
- Sanskrit: एकं (eka)
- Sardinian: unu
- Scottish Gaelic: aon
- Sepedi (Northern Sotho): tee
- Serbian:
- Cyrillic: један
- Roman: jedan

- Shelta: ain, awárt
- Shona: poshi
- Sicilian: unu
- Sindhi:
- Sinhala: එක (eka)
- Siouan:
- Siswati: -nyé
- Slovak: jeden
- Slovene: ena
- Somali: kow, mid, hal
- Sotho: nngwe
- Spanish: un
- Sumerian: desh
- Sundanese: hiji
- Swabian: oe, oas, ois
- Swahili: moja
- Swedish: italbrac abstract counting: ett, italbrac counting objects: ett, en
- Syriac:
- Classical Syriac: h.adh

- Tagalog: isa
- Tahitian:
- Taino: hekiti
- Tajik: як (yak)
- Tamazight: ⵢⴰⵏ (yan) , ⵢⴰⵜ (yat)
- Tamil: ஒன்று (onrru) (numeral: ௧)
- Tasmanian: marra (wa)
- Tatar: бер (ber)
- Telugu: ఒకటి (okatti) (numeral: ౧)
- Tibetan:
- Thai: (nèung) (numeral: )
- Tocharian: se
- Tok Pisin: wanpela
- Tongan: taha
- Tupinambá: îepé, oîepé
- Turkish: bir
- Turkmen: бир
- Tzutujil: jun
- Umbrian: uns
- Urdu: (ik)
- Ukrainian: один
- Uzbek: бир
- Veps: ükś
- Vietnamese: một
- Volapük: bal
- Vorarlbergerisch: aas, (var: oas)
- Võro: ütś
- Votic: ühsi / үхси
- Walloon: onk
- Warlpiri: cinta
- Waurá: pawã
- Wede: bo
- Welsh: un
- Western Apache: dałaá
- Witoto: dáde
- Xhosa: inye
- Yiddish: eyns
- Yucatec (Maya): hun
- Yuchi:
- Zapotec: to

ordinal number

set or group with one component

- Lithuanian: vieneri, vienerios

### Pronoun

- In the context of "nominative case": Any person or thing.
- One shouldn’t be too quick to judge.
- The big one looks good.

- In the context of "accusative case": Any person or thing.
- I want the green one.
- One’s guilt may trouble one.

#### Translations

nominative

- Breton: den ebet, unan bennak
- Catalan: algú , qualcú , alguna , qualcuna
- Danish: man, en/én; expressed by nominalization when following an adjective
- Dutch: men italbrac obsolete, je, ze; expressed by nominalization when following an adjective
- Esperanto: oni
- Finnish: not translated
- French: on, quelqu'un
- German: man; expressed by nominalization when following an adjective
- Hindi: not translated
- Interlingua: uno, alcuno; expressed by reflexivization in expressions of the type "one" + transitive verb + direct object
- Japanese: 自分, 自
- Malaysian: satu
- Novial:
- Portuguese: a pessoa , alguém; expressed by reflexivization in expressions of the type "one" + transitive verb + direct object
- Romanian: unul, vreun
- Russian: not translated; expressed by nominalization when following an adjective
- Spanish: uno, alguien
- Swedish: man, en; expressed by nominalization when following an adjective
- Turkish: biri, birini
- Vietnamese: mình

accusative

- Breton: an hini
- Catalan: la
- Danish: en/én ; expressed by nominalization when following an adjective
- Dutch: iemand; expressed by nominalization when following an adjective
- Esperanto: expressed by nominalization when following an adjective
- Finnish: not translated
- French: expressed by nominalization when following an adjective
- Interlingua: expressed by nominalization when following an adjective
- Italian: expressed by nominalization when following an adjective
- Novial: expressed by nominalization when following an adjective
- Portuguese: expressed by nominalization when following an adjective
- Russian: not translated; expressed by nominalization when following an adjective
- Spanish: expressed by nominalization when following an adjective
- Swedish: expressed by nominalization when following an adjective
- Vietnamese: thứ, cái, loại

### Noun

- The neutral element with respect to multiplication in a ring.
- The digit or figure 1.
- A one-dollar bill.
- One run scored by hitting the ball and running between the wickets; a single.

#### Translations

neutral element in multiplication

digit or figure

- Bosnian: jedinica
- Breton: unan
- Catalan: u
- Croatian: jedinica
- Czech: jednička
- Danish: ettal , ener
- Dutch: één
- Esperanto: unu
- Finnish: ykkönen
- French: un
- German: Eins
- Hungarian: egyes
- Interlingua: uno
- Italian: uno
- Kurdish:
- Lithuanian: vienetas
- Polish: jedynka
- Portuguese: um
- Romanian: unu
- Russian: единица
- Serbian:
- Cyrillic: јединица
- Roman: jedinica

- Sindhi:
- Spanish: uno
- Swedish: etta
- Tok Pisin: wan
- Turkish: bir
- Welsh: un

dollar bill

- Breton: ur bilhed un dollar g Breton
- Czech: jednodolarovka
- Danish: endollarseddel
- Dutch: eendollarbiljet/eendollarsbiljet
- French: billet d’un dollar
- Italian: biglietto di un dollaro
- Swedish: endollarsedel/endollarssedel

cricket: single

checktrans-top
Translations to be checked ttbc Vietnamese:
một,
một
giờ, cú
đấm,
một người nào đó, người
ta, ai

### Adjective

- Of a period of time, being particular; as, one morning, one
year.
- One day the prince set forth to kill the dragon that had brought terror to his father’s kingdom for centuries.

- A single, unspecified thing; a; any.
- My aunt used to say, "One day is just like the other."

- Sole, only.
- He is the one man who can help you.

- Whole, entire.
- He is one hell of a guy.

#### Translations

of a period of time

a single, unspecificed thing

sole, only

whole, entire

- ttbc Swedish: en ett (1, 2, 4), not translated (3)
- ttbc Vietnamese: một, như thế không thay đổi

### Derived terms

## Bosnian

### Pronoun

## Croatian

### Pronoun

#### Declension

## Hawaiian

### Etymology

### Noun

## Maori

### Etymology

#### Synonyms

## Polish

### Pronunciation

#### See also

### Etymology

### Noun

## Serbian

### Pronoun

#### Cyrillic spelling

## Slovene

### Pronoun

## Tahitian

### Etymology

### Noun

### Etymology

### Noun

### Etymology

### Noun

# Extensive Definition

1 (one) is a number, numeral, and the name of the
glyph representing that
number. It represents a single entity. One is sometimes referred to
as unity or unit as an adjective. For example, a line segment
of "unit length" is a line segment of length 1.

In mathematics, it may represent:

- historically, the first ordinal number, though some modern conventions use 0 (number) as the first ordinal
- the natural number following 0 and preceding 2, the multiplicative identity of the integers
- the corresponding real number 1, the multiplicative identity of the real and complex numbers
- in abstract algebra, it is the multiplicative identity

## Mathematics

For any number x:- x·1 = 1·x = x (1 is the multiplicative identity)

- x/1 = x (see division)

- x1 = x, 1x = 1, and for nonzero x, x0 = 1 (see exponentiation)

One cannot be used as the base of a positional
numeral
system; sometimes tallying is
referred to as "base 1", since only one mark (the tally) is needed,
but this is not a positional notation.

The logarithms base 1 is
undefined, since 1x=1 and so has no unique inverse
function.

In the real number
system, 1 can be represented in two ways as a recurring
decimal: as 1.000... and as 0.999...
(q.v.).

In the Von Neumann
representation of natural numbers, 1 is defined as the set . This set has cardinality 1 and hereditary
rank 1. Sets like this with a single element are called
singletons.

In Principia
Mathematica, 1 is defined as the set of all singletons.

In a multiplicative group
or monoid, the identity
element is sometimes denoted "1", but "e" (from the German
Einheit, unity) is more traditional. However, "1" is especially
common for the multiplicative identity of a ring.
(Note that this multiplicative identity is also often called
"unity".)

One is its own factorial, and its own square
and cube (and so on, as 1 × 1 × ... ×
1 = 1). One is the first figurate
number of every kind, such as triangular
number, pentagonal
number and centered
hexagonal number to name just a few.

Because of the multiplicative identity, if f(x)
is a multiplicative
function, then f(1) must equal 1.

It is also the first and second numbers in the
Fibonacci
sequence, and is the first number in many mathematical sequences.
As a matter of convention, Sloane's early Handbook of Integer
Sequences added an initial 1 to any sequence that didn't already
have it, and considered these initial 1's in its lexicographic
ordering. Sloane's later Encyclopedia of Integer Sequences and its
Web counterpart, the
On-Line Encyclopedia of Integer Sequences, ignore initial ones
in their lexicographic ordering of sequences, because such initial
ones often correspond to trivial cases.

One is the empty
product.

One is the smallest positive odd integer.

One is a harmonic
divisor number.

One is often the internal representation of the
Boolean
constant true in computer systems.

One is neither a prime number
nor a composite
number, but a unit,
like -1 and, in the Gaussian
integers, i and -i.
The
fundamental theorem of arithmetic guarantees unique factorization over
the integers only up to units (e.g. 4 = 22 = (-1)4×123×22).

One was formerly considered prime by
some mathematicians, using the definition that a prime is divisible
only by one and itself. However, this complicates the
fundamental theorem of arithmetic, so modern definitions
exclude units. The last professional mathematician to publicly
label 1 a prime number was Henri
Lebesgue in 1899.

One is one of three possible values of the
Möbius
function: it takes the value one for square-free
integers with an even number of distinct prime factors.

One is the only odd number in the range of
Euler's
totient function φ(x), in the cases x = 1 and x = 2.

One is the only 1-perfect number (see multiply
perfect number).

By definition, 1 is the magnitude
or absolute
value of a unit vector
and a unit
matrix (more usually called an identity matrix). Note that the
term unit matrix is usually used to mean something quite
different.

One is the most common leading digit in many sets
of data, a consequence of Benford's
law.

### List of basic calculations

## Evolution of the glyph

The glyph used today in the Western world to
represent the number 1, a vertical line, often with a serif at the
top and sometimes a short horizontal line at the bottom, traces its
roots back to the Indians, who wrote 1 as a horizontal line (in
Chinese
today this is the way it is written). The Gupta wrote
it as a curved line, and the Nagari sometimes
added a small circle on the left (rotated a quarter turn to the
right, this 9-look-alike became the present day numeral 1 in the
Gujarati
and Punjabi
scripts). The Nepali
also rotated it to the right, but kept the circle small. This
eventually became the top serif in the modern numeral, but the
occasional short horizontal line at the bottom probably originates
from similarity with the Roman numeral I. In some European
countries (e.g., Germany) the little
serif at the top is sometimes extended into a long upstroke,
sometimes as long as the vertical line, which can lead to confusion
with the glyph for seven in other
countries. Where the 1 is written with a long upstroke, the number
7 has a horizontal stroke through the vertical line.

While the shape of the 1 character has an
ascender in most modern
typefaces, in typefaces
with text figures
the character usually is of x-height, as, for
example, in * The resin
identification code used in recycling to identify polyethylene
terephthalate.

## References

one in Arabic: 1 (عدد)

one in Official Aramaic (700-300 BCE): 1
(ܡܢܝܢܐ)

one in Guarani: Peteĩ

one in Aymara: Maya

one in Belarusian: Лік 1

one in Bosnian: 1 (broj)

one in Bulgarian: 1 (число)

one in Catalan: U (nombre)

one in Chuvash: 1 (хисеп)

one in Cebuano: 1 (numero)

one in Czech: 1 (číslo)

one in Corsican: 1 (numeru)

one in Danish: 1 (tal)

one in Pennsylvania German: Eens

one in German: Eins

one in Erzya: 1 (вейке)

one in Spanish: Uno

one in Esperanto: Unu

one in Basque: Bat

one in Persian: ۱ (عدد)

one in French: 1 (nombre)

one in Gan Chinese: 1

one in Galician: Un

one in Korean: 1

one in Hindi: एक

one in Igbo: Otu

one in Indonesian: 1 (angka)

one in Interlingua (International Auxiliary
Language Association): 1 (numero)

one in Xhosa: Inye

one in Icelandic: Einn

one in Italian: 1 (numero)

one in Hebrew: 1 (מספר)

one in Kinyarwanda: Rimwe

one in Haitian: 1 (nonm)

one in Kurdish: Yek

one in Latin: Unus

one in Luxembourgish: Eent

one in Lithuanian: 1 (skaičius)

one in Lombard: Nümar 1

one in Hungarian: 1 (szám)

nah:Cē
(tlapōhualli)
one in Dutch: 1 (getal)

one in Dutch Low Saxon: 1 (getal)

one in Japanese: 1

one in Neapolitan: Uno

one in Chechen: Цхьаъ

one in Norwegian: 1 (tall)

one in Norwegian Nynorsk: Talet 1

one in Low German: 1 (Tall)

one in Polish: 1 (liczba)

one in Portuguese: Um

one in Quechua: Huk

one in Russian: 1 (число)

one in Simple English: One

one in Slovenian: 1 (število)

one in Serbian: 1 (број)

one in Finnish: 1 (luku)

one in Swedish: 1 (tal)

one in Tagalog: 1 (bilang)

one in Telugu: ఒకటి

one in Thai: 1

one in Vietnamese: 1 (số)

one in Turkish: 1 (sayı)

one in Ukrainian: 1 (число)

one in Wolof: Benn

one in Yiddish: 1 (נומער)

one in Yoruba: Ení

one in Contenese: 1

one in Dimli: 1 (amor)

one in Chinese: 1

# Synonyms, Antonyms and Related Words

Adamite, I, a, a certain, ace, aggregate, alike, all, all one, all the same,
all-embracing, all-inclusive, all-knowing, all-powerful,
all-seeing, all-wise, almighty, amalgamated, an, any, any one, assimilated, associate, atom, atomic, being, blended, body, boundless, cat, certain, changeless, chap, character, coadunate, coalesce, combinative, combinatory, combined, comprehensive, conjoint, conjugate, conjunctive, connect, connective, consolidated, consubstantial, coupled, creating, creative, creature, customer, duck, duplicate, earthling, eclectic, either, entire, eternal, eternally the same,
everlasting, exactly
alike, exclusive,
exhaustive, fellow, fused, glorious, good, gross, groundling, guy, hallowed, hand, head, highest, holistic, holy, homo, homoousian, human, human being, identic, identical, immortal, immutable, inclusive, incorporated, indistinguishable,
individual, indivisible, infinite, integral, integrated, irreducible, joined, joint, joker, just, just alike, life, like, limitless, link, living soul, lone, loving, luminous, majestic, making, man, married, matched, mated, measured, merciful, merged, mixed, monad, monadic, monistic, mortal, no other, none else,
nose, nothing else, nought
beside, numinous,
omnibus, omnipotent, omnipresent, omniscient, one and
indivisible, one and only, only, paired, particular, partnered, party, permanent, perpetual, person, personage, personality, quantified, quantitative, quantitive, quantized, radiant, relate, sacred, same, selfsame, separate, shaping, simple, single, singular, sole, solid, solitary, some, somebody, someone, soul, sovereign, supreme, syncretistic, syncretized, synthesized, tellurian, terran, timeless, total, twin, ubiquitous, unanalyzable, unbounded, unchanging, undefined, undifferent, undivided, uniform, unique, unit, unitary, unite, united, universal, unlimited, wed, wedded, whole, without difference, without
distinction, worldling