definition of
ace

[1] #1 ace n. [one, 1, I, single, unity] the smallest whole number 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". wn

[2] #2 ace n. one of four playing cards in a deck having a single pip on its face. wn

[3] #3 ace n. [adept, champion, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whiz, whizz, wizard, wiz] someone who is dazzlingly skilled in any field. wn

[4] #4 ace s. [A-one, crack, first-rate, super, tiptop, topnotch, top-notch, tops] 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". wn

[5] #5 ace v. [breeze through, 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". wn