1

See also: 1̂, !1, 1., l, ӏ, I, and Ӏ

1 U+0031, 1 DIGIT ONE ← 0 [U+0030] Basic Latin 2 → [U+0032]

Variations

¹ U+00B9, ¹ SUPERSCRIPT ONE ← ¸ [U+00B8] Latin-1 Supplement º → [U+00BA]

₁ U+2081, ₁ SUBSCRIPT ONE ← ₀ [U+2080] Superscripts and Subscripts ₂ → [U+2082]

１ U+FF11, １ FULLWIDTH DIGIT ONE ← ０ [U+FF10] Halfwidth and Fullwidth Forms ２ → [U+FF12]

𝟏 U+1D7CF, 𝟏 MATHEMATICAL BOLD DIGIT ONE ← 𝟎 [U+1D7CE] Mathematical Alphanumeric Symbols 𝟐 → [U+1D7D0]

𝟙 U+1D7D9, 𝟙 MATHEMATICAL DOUBLE-STRUCK DIGIT ONE ← 𝟘 [U+1D7D8] Mathematical Alphanumeric Symbols 𝟚 → [U+1D7DA]

𝟣 U+1D7E3, 𝟣 MATHEMATICAL SANS-SERIF DIGIT ONE ← 𝟢 [U+1D7E2] Mathematical Alphanumeric Symbols 𝟤 → [U+1D7E4]

𝟭 U+1D7ED, 𝟭 MATHEMATICAL SANS-SERIF BOLD DIGIT ONE ← 𝟬 [U+1D7EC] Mathematical Alphanumeric Symbols 𝟮 → [U+1D7EE]

𝟷 U+1D7F7, 𝟷 MATHEMATICAL MONOSPACE DIGIT ONE ← 𝟶 [U+1D7F6] Mathematical Alphanumeric Symbols 𝟸 → [U+1D7F8]

① U+2460, ① CIRCLED DIGIT ONE [unassigned: U+244B–U+245F] ← ⑊ [U+244A] Enclosed Alphanumerics ② → [U+2461]

Translingual

Etymology

Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numerals (compare Devanagari script १ (1, “éka”)), possibly influenced by Roman numeral Ⅰ.

Symbol

The digit ‘1’ in a digital seven segment display.

1 (previous 0, next 2)

1. The cardinal number one, a single thing or unit.
2. A digit in decimal and every other base numbering system, including binary, octal, and hexadecimal.

   15 × 134 = 2010

   0010 0011₂ (the number 35 in binary notation)

   0x1000E001 (the number 268492801 in hexadecimal notation)

3. (mathematics) The identity element with respect to multiplication in a ring.

   a×1 = a

4. (computer science) Bit state corresponding to binary digit 1, or on or true.
5. (mathematics) A Boolean or truth value corresponding to true.

   f : B^k → B : B = {0, 1}

6. (mathematics) The one-point topological space, trivial ring, trivial group, a category with a single object or a (canonical) singleton.
7. (mathematics, set theory) indicator function of a set.

Alternative forms

• Arabic (Eastern) numerals: ١‎
• Arabic (Western) numerals: 1
• Assamese numerals: ১
• Balinese numerals: ᭑
• Bengali numerals: ১
• Chakma numerals: 𑄷
• Cham numerals: ꩑
• Chinese numerals: 壹 , 一
• Devanagari numerals: १
• Egyptian numerals: 𓏺
• Ethiopic numerals: ፩
• Gothic numerals: 𐌰
• Greek numerals: Α΄
• Gujarati numerals: ૧
• Gurmukhi numerals: ੧
• Hebrew numerals: א‎

• Javanese numerals: ꧑
• Kannada numerals: ೧
• Kayah Li numerals: ꤁
• Khmer numerals: ១
• Khudawadi numerals: 𑋱
• Lao numerals: ໑
• Lepcha numerals: ᱁
• Limbu numerals: ᥇
• Malayalam numerals: ൧
• Meitei numerals: ꯱
• Mongolian numerals: ᠑
• Myanmar numerals: ၁
• N'Ko numerals: ߁‎‎
• Ol Chiki numerals: ᱑
• Old Persian numerals: 𐏑

• Oriya numerals: ୧
• Osmanya numerals: 𐒡
• Persian numerals: ۱‎
• Roman numerals: I
• Saurashtra numerals: ꣑
• Sharada numerals: 𑇑
• Sinhalese numerals: ෧ , (archaic) 𑇡
• Sundanese numerals: ᮱
• Takri numerals: 𑛁
• Tamil numerals: ௧
• Telugu numerals: ౧
• Thai numerals: ๑
• Tibetan numerals: ༡
• Tirhuta numerals: 𑓑
• Warang Citi numerals: 𑣡

Derived terms

Derived terms

• (select cardinal numbers containing ‘1’) 10, 11, 12, ..., 100, 101, 102, ..., 1000, ..., 10,000, 100,000, 1,000,000, ...
• (other select numbers containing ‘1’) -10, -1, -0.1, ..., 0.1, 0.01, 0.001, ...
• +1

See also

• (Arabic digits): 0 1 2 3 4 5 6 7 8 9

See also

• 1 (number) in Wikipedia

Other representations of 1:

Morse code: ·–––– Braille: ⠁ ASL Manual: 1@Side-PalmBack

Signal flag (ICS and NATO):

Semaphore: After showing "numeric"

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English

Pronunciation

• enPR: wŭn, IPA^(key): /wʌn/, IPA^(key): /wan/

• Audio (US)

  (file)

• Rhymes: -ʌn

Symbol

1

1. The number one (1).
2. (Internet slang, leetspeak, sarcastic) Deliberate misspelling of !, imitating someone who is too excited to consistently press the shift key while typing exclamation marks.

   A: sum1 hlep me plz im alwyz l0zin!!1!?!/?

   B: Thts bcuz ur st00pid!!!!!11!!oneone!!1!!eleven!1

Synonyms

• (sarcastic, deliberate misspelling of !): one, eleven

Derived terms

• (ordinal) 1st

Translations

deliberate misspelling of !

• Hungarian: 4 (hu)

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American Sign Language

Numeral

1 (transliteration needed)

1. one

Noun

1 (transliteration needed)

1. A metasyntactic variable used to denote a person.

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Chinese

Pronunciation

• Mandarin

  (Standard)

  (Pinyin): yī (yi¹)

  (Zhuyin): ㄧ

  (Chengdu, SP): yi²

  (Dungan, Cyrillic): йи (ji, I)

• Cantonese

  (Guangzhou, Jyutping): jat¹

  (Taishan, Wiktionary): yit²

• Gan (Wiktionary): it⁶
• Hakka

  (Sixian, PFS): yit

  (Meixian, Guangdong): yid⁵

• Jin (Wiktionary): ieh⁴
• Min Bei (KCR): cì / ĭ
• Min Dong (BUC): siŏh / ék

• Min Nan

  (Hokkien, POJ): chi̍t / it

  (Teochew, Peng'im): zêg⁸ / ig⁴ / êg⁴

• Wu (Wiktionary): iq (T4)
• Xiang (Wiktionary): i⁶

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• Mandarin
  • (Standard Chinese)⁺
    • Pinyin: yī
    • Zhuyin: ㄧ
    • Wade–Giles: i¹
    • Gwoyeu Romatzyh: i
    • Tongyong Pinyin: yi
    • Sinological IPA ^(key): /i⁵⁵/

Note:

• Pronounced 幺 (yāo) when spelling phone number, one on dice or dominoes. This is similar to the English pronunciation of '0' as 'o' in strings of digits, such as 90210.
• Subject to retrograde tone sandhi (see Wikipedia for details):
  • before fourth tone, pronounced with second tone;
  • before any other tone, pronounced with fourth tone;
  • when final (or at the end of a multi-syllable word), pronounced with the original tone (first tone);
  • when used in a series of numbers, as a part of a number, in dates, or in addresses, pronounced with the original tone (first tone).
• When used between two reduplicated words, pronounced with neutral tone.

• (Chengdu)
  • Sichuanese Pinyin: yi²
  • Scuanxua Ladinxua Xin Wenz: i
  • Sinological IPA ^(key): /i²¹/
• (Dungan)
  • Cyrillic: йи (ji, I)
  • Sinological IPA ^(key): /ʝiː²⁴/

  (Note: Dungan pronunciation is currently experimental and may be inaccurate.)

Cantonese

• (Standard Cantonese, Guangzhou)⁺
  • Jyutping: jat¹
  • Yale: yāt
  • Cantonese Pinyin: jat⁷
  • Guangdong Romanization: yed¹
  • Sinological IPA ^(key): /jɐt̚⁵/
• (Taishanese, Taicheng)
  • Wiktionary: yit²
  • Sinological IPA ^(key): /ʒit̚⁵⁵/

Gan

• (Nanchang)
  • Wiktionary: it⁶
  • Sinological IPA ^(key): /it̚⁵/

Hakka

• (Northern Sixian, incl. Miaoli)
  • Pha̍k-fa-sṳ: yit
  • Hakka Romanization System: id`
  • Hagfa Pinyim: yid<sup>5</sup>
  • Sinological IPA: /it̚²/
• (Southern Sixian, incl. Meinong)
  • Pha̍k-fa-sṳ: yit
  • Hakka Romanization System: (r)id`
  • Hagfa Pinyim: yid⁵
  • Sinological IPA: /(j)it̚²/
• (Meixian)
  • Guangdong: yid⁵
  • Sinological IPA: /it̚¹/

Jin

• (Taiyuan)⁺
  • Wiktionary: ieh⁴
  • Sinological IPA (old-style): /iəʔ²/

Min Bei

• (Jian'ou)
  • Kienning Colloquial Romanized: cì / ĭ
  • Sinological IPA ^(key): /t͡si⁴²/, /i²⁴/

Note:

• cì - colloquial;
• ĭ - literary.

Min Dong

• (Fuzhou)
  • Bàng-uâ-cê: siŏh / ék
  • Sinological IPA ^(key): /suoʔ⁵/, /ɛiʔ²⁴/

Note:

• siŏh - colloquial;
• ék - literary.

Min Nan

• (Hokkien)
  • Pe̍h-ōe-jī: chi̍t / it
  • Tâi-lô: tsi̍t / it
  • Phofsit Daibuun: cit, id
  • IPA (Xiamen): /t͡ɕit̚⁴/, /it̚³²/
  • IPA (Quanzhou): /t͡ɕit̚²⁴/, /it̚⁵/
  • IPA (Zhangzhou): /t͡ɕit̚¹²¹/, /it̚³²/
  • IPA (Taipei): /t͡ɕit̚⁴/, /it̚³²/
  • IPA (Kaohsiung): /t͡ɕit̚⁴/, /it̚³²/

Note:

• chi̍t - colloquial;
• it - literary.

• (Teochew)
  • Peng'im: zêg⁸ / ig⁴ / êg⁴
  • Pe̍h-ōe-jī-like: tse̍k / ik / ek
  • Sinological IPA ^(key): /t͡sek̚⁴/, /ik̚²/, /ek̚²/

Note:

• zêg8 - colloquial;
• ig4, êg4 - literary (ig4 - other places, êg4 - Jieyang).

Wu

• (Shanghainese)
  • Wiktionary: iq (T4)
  • Sinological IPA ^(key): /i̯ɪʔ⁵⁵/

Xiang

• (Changsha)
  • Wiktionary: i⁶
  • Sinological IPA ^(key): /i²⁴/

Noun

1

1. one
2. (gay slang) top

Related terms

• 0 (líng)
• 0.5 (língdiǎnwǔ)

Derived terms

• 10 (yīlíng)