# 1

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

## Translingual

### Etymology

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

### Symbol

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. () indicator function of a set.
8. (phonetics, often superscript) the pitch of a tone, either high or low depending on local convention; '1' is most commonly the highest or lowest pitch (but see 0)
Synonyms: ˥, ˩
9. (phonetics, Sinosphere, often superscript) tone number 1, typically identified with dark level yin ping (陰平). May simply be level ping tone () if the yin–yang distinction is not made.
Synonym:
10. (linguistics, superscript) accent 1 in Norwegian, Swedish and Limburgish.
Norwegian/Swedish toneme 1 is sometimes transcribed with a simple primary stress mark, that is ˈ.

#### Alternative forms

The following forms are equivalent as a decimal digit:

The following additional forms are equivalent as a cardinal number:

#### Derived terms

Other representations of 1:

 Signal flag (ICS and NATO): Semaphore:  After showing "numeric"

## English

### Pronunciation

• enPR: wŭn, IPA(key): /wʌn/, IPA(key): /wan/
•  Audio (US) (file)
• Rhymes: -ʌn

### Symbol

1

1. The number one (1).
2. () 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

### Noun

1 (plural 1s)

1. () Clipping of 180. (180° spin)

## Chinese

### Pronunciation

Note:
• Pronounced (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.
• Cantonese
• Gan
• Hakka
• Jin
• Min Bei
• Note:
• cì - colloquial;
• ĭ - literary.
• Min Dong
• Note:
• siŏh - colloquial;
• ék - literary.
• Min Nan
• Note:
• chi̍t - colloquial;
• it - literary.
Note:
• zêg8 - colloquial;
• ig4, êg4 - literary (ig4 - other places, êg4 - Jieyang).
• Wu
• Xiang
• ### Noun

1

1. one
2. () top

#### Derived terms

 10 (yīlíng)

#### Related terms

• 0 (líng)
• 0.5 (língdiǎnwǔ)

## Swedish

### Symbol

1

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

### Suffix

1

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