o

Letter (1)

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

Numeral (1)

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

Noun (1)

o (plural oes)

1. The name of the Latin script letter O/o.
2. A zero (used in reading out numbers).
   • 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).

Letter (2) capitalized: O

UK/əʊ/US/oʊ/

1. (letter, uppercase) The fifteenth letter of the English alphabet, called o and written in the Latin script.
   • "Supposing somebody sees you, with all those flowers too? Supposing somebody writes him a letter? Ooooh!" (a pure round open Tamil O.)1959, Anthony Burgess, Beds in the East (The Malayan Trilogy), published 1972, page 421

Noun (2) capitalized: O

UK/əʊ/US/oʊ/

O (plural Os or O's)

1. Something shaped like the letter O.
   • She was lying in the lee of a fowlhouse in a crumpled posture, as if cohesion had been detached from her joints, which lobbed her in an untidy heap, like a lot of old bones, tied together with string. Her skull was hitched under her humped shoulders and her fallen jaw made a lipless O of her mouth...1938, Norman Lindsay, chapter XX, in Age of Consent, London: T[homas] Werner Laurie […], →OCLC, page 213
2. (uncountable) 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.

Numeral (2) capitalized: O

UK/əʊ/US/oʊ/

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

Particle capitalized: O

UK/əʊ/US/oʊ/

O

1. The vocative particle, used for direct address.
   • 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".
   • Therfore arte thou inexcuſable o man whoſoever thou be that iudgeſt. For in that ſame where in thou iudgeſt another / thou cõdemneſt thy ſilfe. For thou that iudgeſt doest evẽ the ſame ſilfe thynges. […] Thynkeſt thou O man that iudgeſt them which do ſoche thyngꝭ and yet doſt evẽ the very ſame /...1526, [William Tyndale, transl.], The Newe Testamẽt […] (Tyndale Bible), [Worms, Germany: Peter Schöffer], →OCLC, Romans ij:[1, 3], folio cc, verso

Noun (3) capitalized: O

UK/əʊ/US/oʊ/

O (plural Oes)

1. An utterance of the vocative O.

Noun (4) capitalized: O

UK/əʊ/US/oʊ/

O (countable and uncountable, plural Os)

1. American Library Association abbreviation of octavo, a book size (20-25 cm).
2. Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc.
3. The number of overs bowled.
4. (slang) Orgasm.
   • Sunny felt some cold and wet press against her pussy, it startled her, then it's^([sic]) tongue went deep inside of her, she had been eaten out before, but never this could, who ever was doing it was a real pro, and had to have the longest tongue in the world it was buried at least three inches...1998 October 17, M6968, “STORY: The Violation of Sunny a wrestling story, by Wonder Mike”, in alt.sex.stories (Usenet), retrieved 22 Nov 2014
   • Further on, when she's about to reach her first O, the taste turns from no taste to champagne-like.1999 March 31, JT aka GF, “Re: mary p., hex and going "downtown"”, in alt.psst.hoy (Usenet), retrieved 22 Nov 2014

   Synonyms:

   big O

5. (slang, uncountable) Opium.
   • We lay on our stomachs on the living-room floor in a circle around our host, a skinny little man who said he'd been smoking O for 20 years.1952, Collier's: Incorporating Features of the American Magazine, page 22

Adjective (1) capitalized: O

UK/əʊ/US/oʊ/

O (not comparable)

1. (abbreviation, historical) Abbreviation of morally offensive, film classification of the National Legion of Decency.
2. (Judaism, abbreviation) Abbreviation of Orthodox.

Proper noun (1) capitalized: O

UK/əʊ/US/oʊ/

O

1. A surname from Korean.

Proper noun (2) capitalized: O

IPA/ʌ/UK/əʊ/

O

1. A surname from Mandarin Chinese.
2. (alternative) Alternative form of E (Ancient Chinese Kingdom)
   • ACCORDING to various inscriptions about this famous temple we are told that it was erected to the memory of Ya Fei, "An Unswerving Guardian to the Heir-Apparent," of the Sung dynasty; "A Loyal-to-the-end Minister," who came from the ancient state of O-Kuo, the present Wu Ch'ang-fu of Hupei; and...[1906, Frederick D. Cloud, Hangchow, the "City of Heaven", Shanghai: Presbyterian Mission Press, →OCLC, →OL, page 53
   • In ancient times Wuchang was the capital city of the Kingdom of O. In Manchu times it was the residence of the Viceroy of the two provinces of Hupeh and Hunan. Since then its fortunes have changed with changing politics.1944, Harold Burgoyne Rattenbury, China, My China, →OCLC, page 51

Adjective (2) capitalized: O

Singapore/oʊ/UK/əʊ/

O (not comparable)

1. (Singapore, colloquial) With sugar and no condensed milk added.
   • Better try their kopi-o tarik. Our version nowadays taste like cough medicine. LOL!2003, Ixus, soc.culture.singapore (Usenet)