1

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

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]

See also: 1̂, !1, 1., l, ӏ, I, and Ӏ

Contents

TranslingualEdit

EtymologyEdit

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.

SymbolEdit

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

1

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

   0x1000E001

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.

See alsoEdit

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

Alternative formsEdit

• Arabic (Eastern) numerals: ١‏
• Arabic (Western) numerals: 1
• Balinese numerals: ᭑
• Bengali numerals: ১
• Chinese numerals: 壹 , 一
• Devanagari numerals: १
• Ethiopic numerals: ፩
• Gujarati numerals: ૧
• Gurmukhi numerals: ੧
• Hebrew numerals: א‏

• Javanese numerals: ꧑
• Kannada numerals: ೧
• Khmer numerals: ១
• Lao numerals: ໑
• Limbu numerals: ᥇
• Malayalam numerals: ൧
• Mongolian numerals: ᠑
• Myanmar numerals: ၁
• Ol Chiki numerals: ᱑
• Oriya numerals: ୧

• Osmanya numerals: 𐒡
• Persian numerals: ۱‏
• Roman numerals: I
• Saurashtra numerals: ꣑
• Sinhalese numerals: ෧ , (archaic) 𑇡
• Sundanese numerals: ᮱
• Tamil numerals: ௧
• Telugu numerals: ౧
• Thai numerals: ๑
• Tibetan numerals: ༡

Derived termsEdit

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 alsoEdit

• 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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EnglishEdit

PronunciationEdit

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

• Audio (US)

  (file)

• Rhymes: -ʌn

SymbolEdit

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

TranslationsEdit

deliberate misspelling of !

• Hungarian: 4 (hu)

Derived termsEdit

• (ordinal) 1st

SynonymsEdit

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

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American Sign LanguageEdit

NumeralEdit

1 (transliteration needed)

1. one

NounEdit

1 (transliteration needed)

1. A metasyntactic variable used to denote a person.

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ChineseEdit

PronunciationEdit

• Mandarin

  (Pinyin): yī (yi¹)

  (Zhuyin): ㄧ

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• Mandarin
  • (Standard Chinese, Beijing)⁺
    • Pinyin: yī
    • Zhuyin: ㄧ
    • Wade-Giles: i¹
    • Gwoyeu Romatzyh: i
    • IPA ^(key): /i⁵⁵/

NounEdit

1

1. (slang) top (gay slang)

Derived termsEdit

• 10