| Adj. | 1. | A-one - of the highest quality; "an ace reporter"; "a crack shot"; "a first-rate golfer"; "a super party"; "played top-notch tennis"; "an athlete in tiptop condition"; "she is absolutely tops"colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech superior - of high or superior quality or performance; "superior wisdom derived from experience"; "superior math students" | |