0

See also: o, O, 0., 〇, ⓪, and Appendix:Variations of "o"

0 U+0030, 0 DIGIT ZERO ← / [U+002F] Basic Latin 1 → [U+0031]

Character variations

⁰ U+2070, ⁰ SUPERSCRIPT ZERO ← [U+206F] Superscripts and Subscripts ⁱ → [U+2071]

₀ U+2080, ₀ SUBSCRIPT ZERO ← ⁿ [U+207F] Superscripts and Subscripts ₁ → [U+2081]

０ U+FF10, ０ FULLWIDTH DIGIT ZERO ← ／ [U+FF0F] Halfwidth and Fullwidth Forms １ → [U+FF11]

𝟎 U+1D7CE, 𝟎 MATHEMATICAL BOLD DIGIT ZERO [unassigned: U+1D7CC–U+1D7CD] ← 𝟋 [U+1D7CB] Mathematical Alphanumeric Symbols 𝟏 → [U+1D7CF]

𝟘 U+1D7D8, 𝟘 MATHEMATICAL DOUBLE-STRUCK DIGIT ZERO ← 𝟗 [U+1D7D7] Mathematical Alphanumeric Symbols 𝟙 → [U+1D7D9]

𝟢 U+1D7E2, 𝟢 MATHEMATICAL SANS-SERIF DIGIT ZERO ← 𝟡 [U+1D7E1] Mathematical Alphanumeric Symbols 𝟣 → [U+1D7E3]

𝟬 U+1D7EC, 𝟬 MATHEMATICAL SANS-SERIF BOLD DIGIT ZERO ← 𝟫 [U+1D7EB] Mathematical Alphanumeric Symbols 𝟭 → [U+1D7ED]

𝟶 U+1D7F6, 𝟶 MATHEMATICAL MONOSPACE DIGIT ZERO ← 𝟵 [U+1D7F5] Mathematical Alphanumeric Symbols 𝟷 → [U+1D7F7]

🯰 U+1FBF0, 🯰 SEGMENTED DIGIT ZERO [unassigned: U+1FBCB–U+1FBEF] ← 🯊 [U+1FBCA] Symbols for Legacy Computing 🯱 → [U+1FBF1]

The slashed variant of the digit

Translingual

Alternative forms

• 0̸ (slashed zero, available only as a combination of Unicode characters, variation selectors or through font features)

Glyph origin

Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numeral ‫٠ (0)‬ (compare Devanāgarī script ०), adopted for use with the Latin script in Europe. See 0 § History for more.

Symbol

0

1. (Arabic digits) The cardinal number zero indicating absence of any quantity.
2. A digit in decimal, binary, and every other base numbering system.

   15 × 134 = 2010

   0000 0001₂

   0x1000E001 (hexadecimal notation)

3. (mathematics) The identity element with respect to addition.

   $\exists \,\mathbf {0} :\forall a\in A:\mathbf {0} +a=a+\mathbf {0} =a$

4. (mathematics, computer science) A Boolean or truth value corresponding to false.

   f : B^k → B : B = {0, 1}

   A&B&C=0 → A=0 || B=0 || C=0

5. (computing) Indicates that the number that follows is in octal.
6. (phonetics, often superscript) the pitch of a tone that is more extreme than 1 (higher or lower, depending on local convention; e.g. 0 is the highest tone in Chatino)
7. (phonetics, Sinosphere, often superscript) lack of an inherent tone; the pitch depends on the tones of the surrounding syllables.

Alternative forms

The following forms are equivalent as a decimal digit:

• Arabic (Eastern) numerals: ٠
• Arabic (Western) numerals: 0
• Assamese numerals: ০
• Balinese numerals: ᭐
• Bengali numerals: ০
• Brahmi numerals: 𑁦
• Chakma numerals: 𑄶
• Cham numerals: ꩐
• Devanagari numerals: ०
• Dhives Akuru numerals: 𑥐
• Gujarati numerals: ૦
• Gurmukhi numerals: ੦
• Hanifi Rohingya numerals: 𐴰
• Javanese numerals: ꧐
• Kannada numerals: ೦
• Kawi numerals: 𑽐
• Kayah Li numerals: ꤀
• Khmer numerals: ០
• Khudawadi numerals: 𑋰
• Lanna numerals: (secular) ᪀, (religious) ᪐
• Lao numerals: ໐
• Lepcha numerals: ᱀
• Limbu numerals: ᥆
• Malayalam numerals: ൦
• Meitei numerals: ꯰
• Mongolian numerals: ᠐
• Myanmar numerals: ၀
• N'Ko numerals: ߀
• Ol Chiki numerals: ᱐
• Odia numerals: ୦
• Osmanya numerals: 𐒠
• Persian numerals: ۰
• Saurashtra numerals: ꣐
• Sharada numerals: 𑇐
• Sinhalese numerals: ෦
• Sundanese numerals: ᮰
• Takri numerals: 𑛀
• Tamil numerals: ೦
• Telugu numerals: ౦
• Thai numerals: ๐
• Tibetan numerals: ༠
• Tirhuta numerals: 𑓐
• Warang Citi numerals: 𑣠

The additional following forms are equivalent as a cardinal number:

• Armenian numerals: please add, if you can
• Brahmi numerals: n/a
• Chinese numerals: 零, 〇
• CJK tally marks: 〇, (left blank)
• Counting rod numerals: 〇
• Egyptian numerals: 𓄤
• Ethiopic numerals: n/a
• Gothic numerals: n/a
• Greek numerals: n/a
• Hebrew numerals: n/a
• Old Persian numerals: n/a
• Roman numerals: n/a
• Sinhalese numerals: please add, if you can
• Tally marks: (left blank to denote zero)

Derived terms

Derived terms

• (select cardinal numbers containing ‘0’) 10, 20, 30, ..., 100, 101, 102, ..., 1000, ..., 10,000, 100,000, 1,000,000, ...
• (other select numbers containing ‘0’) -10, -1.01, -0.1, ..., 0.1, 0.01, 0.001, ...
• (select currency expressions containing ‘0’) $0, $0.01, $1.00

Gallery

• Styles
• 
  A vintage clock with numbers 0–11.
• 
  The digit ‘0’ in a digital seven segment display.

See also

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

Other representations of 0:

Morse code: ––––– Braille: ⠚

Signal flag (ICS and NATO):

Semaphore: After showing "numeric"

English

Pronunciation

• (number, digit, “zero”):
  • enPR: zē′rō, IPA^(key): /ˈziːɹəʊ/
  • IPA^(key): /ˈzɪəɹəʊ/

  • Audio (US):

    (file)

  • Rhymes: -ɪəɹəʊ
• (digit, “nought”):
  • IPA^(key): /ˈnɔːt/
  • Rhymes: -ɔːt
• (digit, “oh” o):
  • IPA^(key): /ˈəʊ/
  • Rhymes: -əʊ

  The pronunciation as a digit is very often shortened to that of the letter O to save time or keep rhythm. This change is required for the tens place of minutes following the hour and in shortened pronunciation of numbers between 10 and 19 hundred, including years, as well as their truncated two-digit forms, where the zero is a leading digit. It is also very common when saying telephone numbers, decimals after the decimal point, the leading zero in decimal fractions less than one, or many other words such as 007 double o seven.

Noun

0 (plural 0s)

1. 0.
2. The origin, starting point, or fixed reference point, especially for a measurement.

   The 0 for the Celsius scale is 273.15 Kelvin.

3. (electrical engineering) The off or low bit state.

   If the NOT gate input is 1, the output is 0.

Derived terms

• 0th, the ordinal number form

See also

• 0 (number) in Wikipedia
• 1
• 2

Chinese

Etymology 1

Pronunciation

• Mandarin

  (Pinyin): líng (ling²)

  (Zhuyin): ㄌㄧㄥˊ

• Cantonese (Jyutping): ling⁴
• Wu (Wugniu)
  • (Northern): ⁶lin

---

• Mandarin
  • (Standard Chinese)⁺
    • Hanyu Pinyin: líng
    • Zhuyin: ㄌㄧㄥˊ
    • Tongyong Pinyin: líng
    • Wade–Giles: ling²
    • Yale: líng
    • Gwoyeu Romatzyh: ling
    • Palladius: лин (lin)
    • Sinological IPA ^(key): /liŋ³⁵/
• Cantonese
  • (Standard Cantonese, Guangzhou–Hong Kong)⁺
    • Jyutping: ling⁴
    • Yale: lìhng
    • Cantonese Pinyin: ling⁴
    • Guangdong Romanization: ling⁴
    • Sinological IPA ^(key): /lɪŋ²¹/
• Wu
  • (Shanghai):
    • Wugniu: ⁶lin
    • MiniDict: lin^去
    • Wiktionary Romanisation (Shanghai): ³lin
    • Sinological IPA (Shanghai): /lin²³/

Noun

0

1. (gay slang) bottom

Synonyms

• (Hong Kong Cantonese) 0仔 (ling⁴ zai²)

Derived terms

• 10

 

Related terms

• 0.5 (língdiǎnwǔ)
• 1 (yī)

Etymology 2

Grammaticisation of 零 (“zero”).

Pronunciation

• Cantonese (Jyutping): ling⁴

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• Cantonese
  • (Standard Cantonese, Guangzhou–Hong Kong)⁺
    • Jyutping: ling⁴
    • Yale: lìhng
    • Cantonese Pinyin: ling⁴
    • Guangdong Romanization: ling⁴
    • Sinological IPA ^(key): /lɪŋ²¹/

Particle

0

1. (Hong Kong Cantonese, Internet slang, neologism) A negation particle (clarification of this definition is needed)

References

• 2024, 陳詠儀 [Wing Yee Chan], 唐翊竣 [Yik Chun Tong], 謝家朗 [Ka Long Tse], “香港粵語否定詞“0”的語法特徵 [Grammatical Features of the Negative Word "0" in Hong Kong Cantonese]”, in 《中國語文通訊》, volume 103, number 1, →DOI, pages 43-65: