Standard Lemma guide

o

adj · character · intj · name · noun · num · particle · prep · 29 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /əʊ/
  • Received-Pronunciation: Recorded audio is listed in the source snapshot.
  • General-American: /oʊ/
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -əʊ
  • Singapore: /oʊ/
  • Singapore: [ˈoː˦]
  • Singapore: [ˈo]
  • Singapore: /ɔː(˦)/ approximating Hokkien
  • UK: /ˈəʊ/
  • US: /ˈoʊ/
  • General-American: Recorded audio is listed in the source snapshot.
  • homophone: O
  • homophone: oh
  • homophone: owe (toe–tow merger)
  • /ʌ/
  • ŭ
  • rhymes with -ʌ
  • CMU ARPABET: OW1 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Clipping of over.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, alt-of, clipping

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Abbreviation of morally offensive, film classification of the National Legion of Decency.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, alt-of, historical, not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Abbreviation of Orthodox.

Definition source: English Wiktionary via Wiktextract

Usage: Judaism, abbreviation, alt-of, not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

With sugar and no condensed milk added.

Definition source: English Wiktionary via Wiktextract

Usage: Singapore, colloquial, not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

character

Meaning 5

The fifteenth letter of the English alphabet, called o and written in the Latin script.

Definition source: English Wiktionary via Wiktextract

Usage: letter, lowercase

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

character

Meaning 6

Alternative form of ο, the fifteenth letter of the Classical and Modern Greek alphabets, called omicron and (astronomy) used as an abbreviation of omicron in star names.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative, letter, lowercase

Examples

  • The system's Bayer designation is o Persei.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

intj

Meaning 7

Alternative form of oh.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

name

Meaning 8

A surname from Korean.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

name

Meaning 9

A surname from Mandarin Chinese.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

name

Meaning 10

Alternative form of E (Ancient Chinese Kingdom)

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

The name of the Latin script letter O/o.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

noun

Meaning 12

A zero (used in reading out numbers).

Definition source: English Wiktionary via Wiktextract

Examples

  • It is currently two-o-five in the afternoon (2:05 PM).
  • The first permanent English settlement in America was in Jamestown in sixteen-o-seven (1607).

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

noun

Meaning 13

Operator

Definition source: English Wiktionary via Wiktextract

Usage: Internet, abbreviation, acronym, alt-of

Topics: IRC

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

14

noun

Meaning 14

Object, see SVO

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, acronym, alt-of

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

15

noun

Meaning 15

Something shaped like the letter O.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

16

noun

Meaning 16

A blood type that lacks A or B antigens and may only receive transfusions of similar type O blood, but may donate to all (neglecting Rh factor). Synonym: universal donor.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

17

noun

Meaning 17

An utterance of the vocative O.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

18

noun

Meaning 18

American Library Association abbreviation of octavo, a book size (20-25 cm).

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: media, printing, publishing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

19

noun

Meaning 19

Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: ball-games, games, hobbies, lifestyle, soccer, sports

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

20

noun

Meaning 20

The number of overs bowled.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: ball-games, cricket, games, hobbies, lifestyle, sports

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

21

noun

Meaning 21

Orgasm.

Definition source: English Wiktionary via Wiktextract

Usage: countable, slang, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: big O

Antonyms: none provided

22

noun

Meaning 22

Opium.

Definition source: English Wiktionary via Wiktextract

Usage: slang, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

23

num

Meaning 23

The fifteenth numeral symbol of the English alphabet, called o and written in the Latin script.

Definition source: English Wiktionary via Wiktextract

Usage: lowercase

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

24

particle

Meaning 24

alternative form of O (vocative particle)

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative, nonstandard

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

25

particle

Meaning 25

The vocative particle, used for direct address.

Definition source: English Wiktionary via Wiktextract

Examples

  • O Death! O Death! Won't you spare me over till another year? - part of the refrain from the American folk song "A Conversation with Death".
  • c. 1810-1820?, Samuel Taylor Coleridge, Notes on Macbeth O! the affecting beauty of the death of Cawdor, and the presentimental speech of the king: [...]

Meaning relationships

Synonyms: none provided

Antonyms: none provided

26

prep

Meaning 26

Alternative form of of.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

27

noun

Meaning 27

the blood group whose red cells carry neither the A nor B antigens

Definition source: Princeton WordNet 3.0

Examples

  • people with type O blood are universal donors

Meaning relationships

Synonyms: type O, group O

Antonyms: none provided

Broader terms: blood group, blood type

28

noun

Meaning 28

the 15th letter of the Roman alphabet

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: letter, letter of the alphabet, alphabetic character

29

noun

Meaning 29

a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: oxygen, atomic number 8

Antonyms: none provided

Broader terms: chemical element, element, gas

Narrower terms: liquid oxygen, LOX

History

Etymology

Abbreviation.

From Hokkien 烏 /乌 (o͘, “black”) or Teochew 烏 /乌 (ou1, “black”).

Korean 오(伍) (O) or 오(吳) (O). Doublet of Wu.

From Mandarin 鄂 (È) Wade–Giles romanization: O4.

From Middle English O, o, from Old English o, from Latin o and Ancient Greek ὦ (ô, interjection). Featured prominently in William Tyndale's 1525 translation of the New Testament.

See o'.

Across languages

Translations

88 source translations are retained for this English entry.

  • Alabama: òoka — name of the letter O, o
  • Arabic: أُوه (ʔūh) — name of the letter O, o
  • Arabic: أُوه (ʔoh) — name of the letter O, o
  • Asturian: o — name of the letter O, o
  • Bengali: ও (ō) — name of the letter O, o
  • Bulgarian: о (o) — name of the letter O, o
  • Burmese: အို (ui) — name of the letter O, o
  • Catalan: o — name of the letter O, o
  • Esperanto: o — name of the letter O, o
  • Finnish: oo — name of the letter O, o
  • French: o — name of the letter O, o
  • Galician: o — name of the letter O, o
  • Greek: όου (óou) — name of the letter O, o
  • Hawaiian: ʻō — name of the letter O, o
  • Hindi: ओ (o) — name of the letter O, o
  • Ido: o — name of the letter O, o
  • Irish: ó — name of the letter O, o
  • Irish: onn — name of the letter O, o
  • Japanese: オウ (ō) — name of the letter O, o
  • Korean: 오 (o) — name of the letter O, o
  • Latin: ō — name of the letter O, o
  • Malay: o — name of the letter O, o
  • Marathi: ओ (o) — name of the letter O, o
  • Occitan: o — name of the letter O, o
  • Portuguese: ó — name of the letter O, o
  • Portuguese: ô — name of the letter O, o
  • Russian: о́у (óu) — name of the letter O, o
  • Russian: о (o) — name of the letter O, o
  • Spanish: o — name of the letter O, o
  • Thai: โอ (oo) — name of the letter O, o
  • Turkish: o — name of the letter O, o
  • Vietnamese: o — name of the letter O, o
  • Arabic: يَا (yā) — a vocative particle
  • Arabic: أَيُّهَا (ʔayyuhā) — a vocative particle
  • Arabic: أَيَّتُهَا (ʔayyatuhā) — a vocative particle
  • Arabic: يا (yā) — a vocative particle
  • Armenian: ով (ov) — a vocative particle
  • Belarusian: о (o) — a vocative particle
  • Catalan: oh — a vocative particle
  • Catalan: o — a vocative particle
  • Chinese Mandarin: 噢 (ō) — a vocative particle
  • Chinese Mandarin: 喔 (ō) — a vocative particle
  • Chinese Mandarin: 啊 (ā) — a vocative particle
  • Chinese Mandarin: 噫 (yì) — a vocative particle
  • Esperanto: ho — a vocative particle
  • Finnish: oi — a vocative particle
  • French: ô — a vocative particle
  • German: o — a vocative particle
  • Ancient Greek: ὦ (ô) — a vocative particle
  • Hebrew: הו (ho) — a vocative particle
  • Hindi: हे (he) — a vocative particle
  • Irish: a — a vocative particle
  • Old Irish: a — a vocative particle
  • Old Irish: á — a vocative particle
  • Italian: o — a vocative particle
  • Italian: oh — a vocative particle
  • Japanese: よ (yo) — a vocative particle
  • Japanese: ああ (ā) — a vocative particle
  • Korean: 여 (yeo) — a vocative particle
  • Korean: 시여 (siyeo) — a vocative particle
  • Korean: 아 (a) — a vocative particle
  • Latin: o — a vocative particle
  • Malay: wahai — a vocative particle
  • Old Tupi: gûé — a vocative particle
  • Old Tupi: gûy — a vocative particle
  • Old Tupi: îu — a vocative particle
  • Old Tupi: îó — a vocative particle
  • Persian: ای (ey) — a vocative particle
  • Persian: الا (alâ) — a vocative particle
  • Polish: o — a vocative particle
  • Portuguese: ó — a vocative particle
  • Russian: о (o) — a vocative particle
  • Sanskrit: हे (he) — a vocative particle
  • Scottish Gaelic: a — a vocative particle
  • Sicilian: o — a vocative particle
  • Sicilian: oh — a vocative particle
  • Spanish: oh — a vocative particle
  • Spanish: oy — a vocative particle
  • Swedish: o — a vocative particle
  • Tagalog: oh — a vocative particle
  • Tocharian B: yśe — a vocative particle
  • Turkish: ey — a vocative particle
  • Turkish: ya — a vocative particle
  • Ukrainian: о (o) — a vocative particle
  • Urdu: اَے (ai) — a vocative particle
  • Vietnamese: hỡi — a vocative particle
  • Vietnamese: lạy — a vocative particle
  • Vietnamese: ôi — a vocative particle