O

Unicode name	LATIN CAPITAL LETTER O
Codepoint	U+004F
N ← Basic Latin → P

See also o, ö, ő, and Appendix:Variations of "o"

Translingual

Wikipedia

Letter

O upper case (lower case o)

1. The fifteenth letter of the basic modern Latin alphabet.

See also

• (Latin script):  Aa  Bb  Cc  Dd  Ee  Ff  Gg  Hh  Ii  Jj  Kk  Ll  Mm  Nn  Oo  Pp  Qq  Rr  Ss  Tt  Uu  Vv  Ww  Xx  Yy  Zz
• (Variations of letter O):  Óó  Òò  Ŏŏ  Ôô  Ốố  Ồồ  Ỗỗ  Ổổ  Ǒǒ  Öö  Ȫȫ  Őő  Õõ  Ṍṍ  Ṏṏ  Ȭȭ  Ȯȯ  Ȱȱ  Øø  Ǿǿ  Ǫǫ  Ǭǭ  Ōō  Ṓṓ  Ṑṑ  Ỏỏ  Ȍȍ  Ȏȏ  Ơơ  Ớớ  Ờờ  Ỡỡ  Ởở  Ợợ  Ọọ  Ộộ  Ɵɵ  ⱺ  ᴏ  Ｏｏ  Ꜵꜵ  Œœ  Ꝏꝏ  Ꝍꝍ  Ȣȣ

Symbol

O

1. (chemistry) Symbol for oxygen.
2. (mathematics) The upper bound function also known as big O.

See also

Other representations of O:

NATO phonetic: Oscar Morse code: ––– Braille: ⠕ ASL Manual: O

Signal flag:

Semaphore:

• Letter styles
• 

  Capital and lowercase versions of O, in normal and italic type

• 

  Uppercase and lowercase O in Fraktur

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English

Etymology 1

Pronunciation

• (UK) IPA: /əʊ/, X-SAMPA: /@U/

  Audio (UK)

  (file)

• (US) IPA: /oʊ/, X-SAMPA: /oU/

  Audio (US)

  (file)

Letter

O uppercase (lowercase o)

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

Abbreviation

O

1. (cricket) The number of overs bowled

Noun

O (uncountable)

1. 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.
2. (printing) American Library Association Abbreviation of octavo, a book size (20-25 cm).
3. (soccer) Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc.

See also

• (Latin script letters) letter; Aa, Bb, Cc, Dd, Ee, Ff, Gg, Hh, Ii, Jj, Kk, Ll, Mm, Nn, Oo, Pp, Qq, Rr, Ss, Tt, Uu, Vv, Ww, Xx, Yy, Zz

Number

O upper case (lower case o)

1. The ordinal number fifteenth, derived from this letter of the English alphabet, called o and written in the Latin script.

Etymology 2

Old Saxon gloss o (950s) in Lambeth ms. (957) of Gallican Psalter and ó, o (>1000) in Durham Hymns, regularly as redundant "o eala þu" and "ó eala þu" at uppercase proper names in paraphrase and some verbs in periphrase; Anglo-Norman O (~1200) in mss. of Sts. Juliana and Katherine, and other religiose writs; and English O, o (~1525) in The New Testament Translation by William Tyndale for Ancient Greek ὦ, Latin o (vocative, intensive: Old English èalà, æàlà, ǽlà, hèlà; also Middle English O (Actus 13:10; Romayns 9:20; Galaþies 3:1), ò (Romayns 2:1,3), Irish a (Maþeu 15:28;17:17; Luk 9:41;24:25; Actus 13:10) or A (Actus 27:21; Romayns 11:33)—sometimes mistranscribed as O in online bibles—, þou (1Tymoþe 6:20), ȝe (Actus 18:14), or ∅ (Actus 1:1; Ebrews 10:7) in Newe Testament by Iohn Wiclif (1382). intensive, interrogative: Old English là; English lo, oh (1534))

Particle

O

1. (grammar) The English vocative particle (always in upper case), used for direct address in translations from languages which have the vocative case.

   Therefore arte thou inexcusable o man whosoever thou be that iudgest. For in that same where in thou iudgest another, thou cõdemnest thysilfe. For thou that iudgest doest evẽ the same silfe thynges. ... Thynkest thou O man that iudgest them which do soche thyngs and yet dost evẽ the very same, that thou shalt escape the iudgemẽt of God? (Romans 2:1,3; Tyndale 1530s)

Derived terms

• O Canada

Translations

a vocative particle

• Ancient Greek: ὦ (ỗ)
• Arabic: يا (ar) (yaa), أيها (ar) ('ayyuhaa)
• Catalan: oh (ca), o (ca)
• Chinese:
• French: ô (fr)
• German: o (de)
• Irish: a (ga)

  Old Irish: a, á

• Japanese: よ (ja) (yo)

• Korean: 여 (ko) (yeo), 시여 (ko) (siyeo)
• Mandarin: 噢 (cmn) (ō), 喔 (cmn) (ō)
• Portuguese: ó (pt)
• Russian: о (ru) (o)
• Sanskrit: हे (sa) (he)
• Spanish: oh (es)
• Turkish: ey (tr)
• Ukrainian: о (uk) (o)

Synonyms

• oh
• hey
• yo
• ah

Interjection

O

1. Expression of earnestness or reverence, used before the name of a deity or revered person in impassioned speech.

Synonyms

• oh
• ah

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American Sign Language

Letter

(Stokoe O)

1. The letter O

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Azeri

Letter

O upper case (lower case o)

1. The twenty-first letter of the Azeri alphabet, written in the Latin script.

See also

• (Latin script letters) hərf; Aa, Bb, Cc, Çç, Dd, Ee, Əə, Ff, Gg, Ğğ, Hh, Xx, Iı, İi, Jj, Kk, Qq, Ll, Mm, Nn, Oo, Öö, Pp, Rr, Ss, Şş, Tt, Uu, Üü, Vv, Yy, Zz

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Dutch

Pronunciation

• (letter name): IPA: /oː/

Letter

O (capital, lowercase o)

1. The fifteenth letter of the Dutch alphabet.

Abbreviation

1. Abbreviation of oost; east

See also

• Previous letter: N
• Next letter: P

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Esperanto

Letter

O upper case (lower case o)

1. The nineteenth letter of the Esperanto alphabet, called o and written in the Latin script.

See also

• (Latin script letters) litero; Aa, Bb, Cc, Ĉĉ, Dd, Ee, Ff, Gg, Ĝĝ, Hh, Ĥĥ, Ii, Jj, Ĵĵ, Kk, Ll, Mm, Nn, Oo, Pp, Rr, Ss, Ŝŝ, Tt, Uu, Ŭŭ, Vv, Zz

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Finnish

Letter

O upper case (lower case o)

1. The fifteenth letter of the Finnish alphabet, called oo and written in the Latin script.

See also

• (Latin script letters) letter; Aa, Bb, Cc, Dd, Ee, Ff, Gg, Hh, Ii, Jj, Kk, Ll, Mm, Nn, Oo, Pp, Qq, Rr, Ss, Šš, Tt, Uu, Vv, Ww, Xx, Yy, Zz, Žž, Åå, Ää, Öö

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French

Pronunciation

• (letter) IPA: /o/, X-SAMPA: /o/

Abbreviation

O

1. Abbreviation of ouest; west

Letter

O

1. The fifteenth letter of the French alphabet.

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Galician

Abbreviation

O

1. oeste, occidente (west)

Synonyms

• (west): W

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German

Pronunciation

• IPA: /ʔoː/

• Audio

  (file)

Letter

O (upper case, lower case o)

1. The fifteenth letter of the German alphabet.

Abbreviation

O

1. Abbreviation of Ost; east

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Italian

Wikipedia ^it

Pronunciation

• (name of letter) IPA: /ɔ/, X-SAMPA: /O/
• Homophone: ho
• (phoneme) IPA: /o/, /ɔ/, X-SAMPA: /o/, /O/
• Homophones: o, ho

Letter

O m and f (invariable, lower case o)

1. The thirteenth letter of the Italian alphabet, called o and written in the Latin script.

See also

• (Latin script letters) lettera; Aa, Bb, Cc, Dd, Ee, Ff, Gg, Hh, Ii, (Jj), (Kk), Ll, Mm, Nn, Oo, Pp, Qq, Rr, Ss, Tt, Uu, Vv, (Ww), (Xx), (Yy), Zz
• Italian alphabet on Wikipedia.Wikipedia:Italian alphabet

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Latvian

Wikipedia ^lv

Etymology

Proposed in 1908 as part of the new Latvian spelling by the scientific commission headed by K. Mīlenbahs, which was accepted and began to be taught in schools in 1909. Prior to that, Latvian had been written in German Fraktur, and sporadically in Cyrillic.

Pronunciation

• IPA: [uə̯], IPA: [o], IPA: [oː]

Letter

O

O upper case (lower case o)

1. The twenty-third letter of the Latvian alphabet, called o and written in the Latin script.

Usage notes

In native Latvian words (and in some older borrowings), o represents the sound of IPA [uə̯] (e.g., otrs [uə̯tɾs]). In more recent borrowings, it represents the original sound of the word, i.e. [o] or [oː] (e.g., opera [oːpeɾa]).

See also

• Letters of the Latvian alphabet:

  burti: Aa, Āā, Bb, Cc, Čč, Dd, Ee, Ēē, Ff, Gg, Ģģ, Hh, Ii, Īī, Jj, Kk, Ķķ, Ll, Ļļ, Mm, Nn, Ņņ, Oo, Pp, Rr, Ss, Šš, Tt, Uu, Ūū, Vv, Zz, Žž

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Malay

Wikipedia ^ms

Pronunciation

• (Name of letter) IPA: [o]
• (Phoneme) IPA: [o], [ɔ]

Letter

O

1. The fifteenth letter of the Malay alphabet, written in the Latin script.

See also

• (Latin script letters) Aa, Bb, Cc, Dd, Ee, Ff, Gg, Hh, Ii, Jj, Kk, Ll, Mm, Nn, Oo, Pp, Qq, Rr, Ss, Tt, Uu, Vv, Ww, Xx, Yy, Zz

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Romanian

Pronunciation

• IPA: /o/

Letter

O (capital, lowercase o)

1. The eighteenth letter of the Romanian alphabet representing the phoneme /o/. Preceded by N and followed by P.

Usage notes

When followed by the letter a, a dipthong representing the phoneme /o̯a/ is formed, as in foarte /'fo̯ar.te/

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Slovene

Wikipedia ^sl

Pronunciation

Letter

O (capital, lowercase o)

1. The 16th letter of the Slovene alphabet. Preceded by N and followed by P.

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Somali

Pronunciation

• (phoneme): IPA: /ɔ/, /ɞ/
• (letter name): IPA: /ʔɔ/

Letter

O upper case (lower case o)

1. The twenty-sixth letter of the Somali alphabet, called o and written in the Latin script.

Usage notes

1. The twenty-sixth letter of the Somali alphabet, which follows Arabic abjad order. It is preceded by I and followed by U.

See also

• (Latin script letters) '', Bb, Tt, Jj, Xx, KHkh, Dd, Rr, Ss, SHsh, DHdh, Cc, Gg, Ff, Qq, Kk, Ll, Mm, Nn, Ww, Hh, Yy, Aa, Ee, Ii, Oo, Uu

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Spanish

Letter

O (upper case, lower case o)

1. The 16th letter of the Spanish alphabet.

Abbreviation

1. Abbreviation of oeste; west

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Turkish

Letter

O upper case (lower case o)

1. The eighteenth letter of the Turkish alphabet, called o and written in the Latin script.

See also

• (Latin script letters) harf; Aa, Bb, Cc, Çç, Dd, Ee, Ff, Gg, Ğğ, Hh, Iı, İi, Jj, Kk, Ll, Mm, Nn, Oo, Öö, Pp, Rr, Ss, Şş, Tt, Uu, Üü, Vv, Yy, Zz