the fifteenth letter of the English alphabet, a vowel.
any spoken sound represented by the letter O or o, as in box, note, short, or love .
something having the shape of an O .
a written or printed representation of the letter O or o.
a device, as a printer's type, for reproducing the letter O or o.
(used before a name in direct address, especially in solemn or poetic language, to lend earnestness to an appeal).
Hear, O Israel!
(used as an expression of surprise, pain, annoyance, longing, gladness, etc.)
the fifteenth in order or in a series.
the Arabic cipher; zero.
(sometimes lowercase) the medieval Roman numeral for 11.
Physiology. a major blood group, usually enabling a person whose blood is of this type to donate blood to persons of group O, A, B, or AB and to receive blood from persons of group O.
Chemistry. oxygen.
Logic. particular negative.
a suffix occurring as the final element in informal shortenings of nouns (ammo; combo; condo; limo; promo ); -o also forms nouns, usually derogatory, for persons or things exemplifying or associated with that specified by the base noun or adjective (cheapo; pinko; sicko; weirdo; wino ).
a suffix occurring in colloquial noun or adjective derivatives, usually grammatically isolated, as in address.
cheerio; kiddo; neato; righto.
octavo.
off.
old.
only.
order.
Baseball. out; outs.
Ocean.
octavo.
October.
Ohio.
Old.
Ontario.
Oregon.
chem oxygen
a human blood type of the ABO group See universal donor
logic a particular negative categorial proposition, such as some men are not married: often symbolized as SoP Compare A E I 2
the 15th letter and fourth vowel of the modern English alphabet
any of several speech sounds represented by this letter, in English as in code, pot, cow, move, or form
another name for nought
a variant spelling of oh
an exclamation introducing an invocation, entreaty, wish, etc
O God!
O for the wings of a dove!
First recorded in 1125–75; Middle English, from Old French, from Latin ō
From Middle English; by shortening
Representing Irish ó descendant, Old Irish au
Perhaps originally the interjection O, appended to words as in -o def. 2; as a derivational suffix reinforced by clipped forms of words with -o- as a linking element (e.g., photo, stereo ), by Rom nouns ending in o, and by personal nouns such as bimbo and bozo, of obscure origin
From the Latin word octārius
Middle English (< Old French ) < Latin < Greek
From the Latin word octārius
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A rau tần ô, also known as an edible chrysanthemum, sits in a back corner of Ngô’s garden across from several kale plants.
From Seattle Times • Aug. 15, 2021
She loves New York but also responds deeply to the Asian Manhattan—to Hong Kong’s entrep ô t culture and it's mercantile mix of Orient and Occident.
From Time • Oct. 24, 2017
Man City are closing in on an £11m deal for Germany defender for Jérôme "What's the shortcut for ô?"
From The Guardian • May 10, 2010
O wretch! ô caitiue! ô too cruell happe!
From A Discourse of Life and Death, by Mornay; and Antonius by Garnier by Herbert, Mary Sidney
According to Act of Parliament./Quis furor ô cives! quæ tanta licentia ferri?/Lucan. lib.
From The Fall of British Tyranny American Liberty Triumphant by Moses, Montrose Jonas
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
