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O
1[ oh ]
noun
- 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.
o-
2- an abridgment of ortho-.
o.
3abbreviation for
- pint.
O.
4abbreviation for
- (in prescriptions) a pint.
O
5[ oh ]
interjection
- (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.)
noun
- the exclamation “O.”
o-
6- variant of ob- before m:
omission.
o.
7abbreviation for
- octavo.
- off.
- old.
- only.
- order.
- Baseball. out; outs.
O.
8abbreviation for
- Ocean.
- octavo.
- October.
- Ohio.
- Old.
- Ontario.
- Oregon.
O
9abbreviation for
- Grammar. object ( def 7 ).
- Old.
o-
10- variant of oo-:
oidium.
O
11- the fifteenth in order or in a series.
- the Arabic cipher; zero.
- (sometimes lowercase) the medieval Roman numeral for 11. Compare Roman numerals ( def ).
- 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. Compare ABO system ( def ).
- Chemistry. oxygen.
- Logic. particular negative.
o'
12[ uh, oh ]
O'
13- a prefix meaning “descendant,” in Irish family names:
O'Brien; O'Connor.
-o
14- 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.
-o-
15- the typical ending of the first element of compounds of Greek origin (as -i- is, in compounds of Latin origin), used regularly in forming new compounds with elements of Greek origin and often used in English as a connective irrespective of etymology:
Franco-Italian; geography; seriocomic; speedometer.
O'-
1prefix
- (in surnames of Irish Gaelic origin) descendant of
O'Corrigan
-o
2suffix
- forming informal and slang variants and abbreviations, esp of nouns
wino
lie doggo
Jacko
-o-
3connective vowel
- used to connect elements in a compound word Compare -i-
filmography
chromosome
O
4symbol for
- chem oxygen
- a human blood type of the ABO group See universal donor
abbreviation for
- slang.offence
O
5/ əʊ /
interjection
- a variant spelling of oh
- an exclamation introducing an invocation, entreaty, wish, etc
O for the wings of a dove!
O God!
o-
6prefix
- short for ortho-
o
7/ əʊ /
noun
- 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
o'
8/ ə /
preposition
- informal.shortened form of of
a cup o' tea
Word History and Origins
Origin of O1
Origin of O2
Origin of O3
Origin of O4
Origin of O5
Origin of O6
Origin of O7
Word History and Origins
Origin of O1
Origin of O2
Origin of O3
Origin of O4
Example Sentences
The influential biologists Robert H. MacArthur and Edward O. Wilson coined the theory of island biogeography 50 years ago to help to explain patterns of species diversity on islands.
It’s since evolved into a F.O.M.O-inducing, invite-only function where both supporters and A-list celebrities cross their fingers to slip inside before the venue reaches capacity.
District Judge David O. Carter’s fervently pursued goal to have as many as 200 units of the temporary housing opened by early next year.
Some of the earliest dishes have found their way onto the menu at our newest café, Patty O’s, where they are enjoying great popularity.
Ms Langdale also asked why Mr Harvey failed to attend a meeting to discuss the deaths of two triplets, Baby O and Baby P, on consecutive days in June 2016.
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