1. (noun)one, 1, I, ace, single, unity the smallest wholenumber or a numeral representing this number "he has the one but will need a two and three to go with it"; "they had lunch at one"
3. (noun)ace, adept, champion, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whiz, whizz, wizard, wiz someone who is dazzlingly skilled in any field
4. (noun)angiotensin converting enzyme, angiotensin-converting enzyme, ACE proteolytic enzyme that converts angiotensin I into angiotensin II
7. (verb)ace, A-one, crack, first-rate, super, tiptop, topnotch, top-notch, tops(p) 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"
8. (verb)breeze through, ace, pass with flying colors, sweep through, sail through, nail succeed at easily "She sailed through her exams"; "You will pass with flying colors"; "She nailed her astrophysics course"
9. (verb)ace score an ace against "He aced his opponents"