o'toole
— Noun
– English
～ British actor (born in Ireland in 1932)
o.d.
— Verb
– English
～ dose too heavily; "The rock star overdosed and was found dead in his hotel room"
O.E.D.
— Noun
– English
～ an unabridged dictionary constructed on historical principles
o.k.
— Noun
– English
～ an endorsement; "they gave us the O.K. to go ahead"
O.K.
— Verb
– English
～ give sanction to; "I approve of his educational policies"
o.k.
— Adjective
– English
～ being satisfactory or in satisfactory condition; "an all-right movie"; "the passengers were shaken up but are all right"; "is everything all right?"; "everything's fine"; "things are okay"; "dinner and the movies had been fine"; "another minute I'd have been fine"
O.K.
— Adverb
– English
～ in a satisfactory or adequate manner; "she'll do okay on her own"; "held up all right under pressure"; (`alright' is a nonstandard variant of `all right')
oafish
— Adjective
– English
～ ill-mannered and coarse and contemptible in behavior or appearance; "was boorish and insensitive"; "the loutish manners of a bully"; "her stupid oafish husband"; "aristocratic contempt for the swinish multitude"