ace

(noun) the smallest whole number or a numeral representing this number. Synonyms: one, 1, I, single, unity. Examples: "He has the one but will need a two and three to go with it." "They had lunch at one."

(noun) one of four playing cards in a deck having a single pip on its face.

(noun) someone who is dazzlingly skilled in any field. Synonyms: adept, champion, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whiz, whizz, wizard, wiz.

(noun) proteolytic enzyme that converts angiotensin I into angiotensin II. Synonyms: angiotensin converting enzyme, angiotensin-converting enzyme, ACE.

(noun) a major strategic headquarters of NATO; safeguards an area extending from Norway to Turkey. Synonyms: Allied Command Europe, ACE.

(noun) a serve that the receiver is unable to reach.

(verb) succeed at easily. Synonyms: breeze through, pass with flying colors, sweep through, sail through, nail. Examples: "She sailed through her exams." "You will pass with flying colors." "She nailed her astrophysics course."

(verb) score an ace against. Example: "He aced his opponents."

(verb) play (a hole) in one stroke.

(verb) serve an ace against (someone).

(adj) of the highest quality. Synonyms: A-one, crack, first-rate, super, tiptop, topnotch, top-notch, tops(predicate). Examples: "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."