Definition one in American English

a minority of one (phrase) heck of a (phrase) hell of a (phrase) hundred percent (phrase) Air Force One () (all) in one (phrase) (all) rolled into one (phrase) all-in-one (adjective) as one (phrase) at (phrase) at one time (phrase) at one with (phrase) back square one (phrase) be as one (phrase) for one (phrase) for one reason or another (phrase) for one thing (phrase) from day one (phrase) go one better (than) (phrase) half past etc. (phrase) have one eye on (phrase) have one too many (phrase) hole in one (noun) I for one... (phrase) in one piece (phrase) one fell swoop (phrase) it takes one to know one (phrase) but one (phrase) loved one (noun) mum-of-one/two/etc (noun) no one (pronoun) not for minute (phrase) not for moment (phrase) not one (phrase) number one (noun) number one (adjective) one (determiner, number, pronoun) one (pronoun) one after another (phrase) one and all (phrase) one and the same (phrase) one another (pronoun) one by one (phrase) one day (phrase) one etc. (phrase) one for the road (phrase) one of a kind (phrase) one of the boys (phrase) one of these days (phrase) one of those days (phrase) one of us (phrase) one or two (phrase) one percenter (noun) one thing after another (phrase) one way or another (phrase) one-armed bandit (noun) one-horse (adjective) one-horse race (noun) one-horse town (noun) one-liner (noun) one-man (adjective) one-man band (noun) one-night stand (noun) one-off (noun) one-off (adjective) one-on-one (adjective, adverb) one-parent family (noun) one-piece (adjective) one-piece (noun) one-shot (adjective) one-sided (adjective) one-size-fits-all (adjective) one-star (adjective) one-stop (adjective) one-time (adjective) one-to-one (adjective) one-track mind (noun) one-trick pony (noun) one-two (noun) one-up (verb) one-upmanship (noun) one-way (adjective) one-way mirror (noun) one-woman (adjective) plus one (noun) public enemy number one (phrase) public enemy number one (noun) pull a fast one (phrase) speak with one voice (phrase) take one look at (phrase) tell me another (one) (phrase) ten to one (phrase) that’s a good one (phrase) the odd out (phrase) the one and only (phrase) tie one on (phrase) time waits for no one (phrase) to one side (phrase) two-one (noun) with one accord (phrase)