1

See also: 1̂, !1, 1., l, ӏ, I, 𐑑, and ↿

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

🯱 U+1FBF1, 🯱
SEGMENTED DIGIT ONE
← 🯰
[U+1FBF0] 		Symbols for Legacy Computing 🯲 →
[U+1FBF2]

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 : Bk → 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

The following forms are equivalent as a decimal digit:

The following additional forms are equivalent as a cardinal number:

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

Other representations of 1:

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

Noun

1 (plural 1s)

  1. (sports, skateboarding, snowboarding, skiing) Clipping of 180. (180° spin)

Translations

Chinese

Pronunciation

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.
Note:
  • cì - colloquial;
  • ĭ - literary.
  • Min Dong
    • (Fuzhou)
      • Bàng-uâ-cê: siŏh / ék
      • Sinological IPA (key): /suoʔ⁵/, /ɛiʔ²⁴/
Note:
  • siŏh - colloquial;
  • ék - literary.
Note:
  • chi̍t - colloquial;
  • it - literary.
Note:
  • zêg8 - colloquial;
  • ig4, êg4 - literary (ig4 - other places, êg4 - Jieyang).

Noun

1

  1. one
  2. (gay slang) top

Derived terms
  • 10 (yīlíng)
  • 0 (líng)
  • 0.5 (língdiǎnwǔ)

Swedish
The Nordic pharmacy chain Apotek1.

Symbol

1

  1. The number one (1).
    Synonyms: ett, en
  2. (Internet slang, leetspeak, sarcastic) Deliberate misspelling of !

Suffix

1

  1. (nonstandard stylistic suffix) -et (“singular indefinite nominative; the”)
    Apotek1
    The Pharmacy
    Bud1
    The Courier
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