| alas | | |
| adv. | 1. alas, regrettably, unfortunately, unluckily | by bad luck.; "unfortunately it rained all day"; "alas, I cannot stay" |
| ace | | |
| n. (quantity) | 1. 1, ace, i, one, 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" |
| ~ digit, figure | one of the elements that collectively form a system of numeration.; "0 and 1 are digits" |
| ~ monas, monad | a singular metaphysical entity from which material properties are said to derive. |
| ~ singleton | a single object (as distinguished from a pair). |
| n. (artifact) | 2. ace | one of four playing cards in a deck having a single pip on its face. |
| ~ ace of clubs | the ace in the club suit. |
| ~ ace of diamonds | the ace in the diamond suit. |
| ~ ace of hearts | the ace in the heart suit. |
| ~ ace of spades | the ace in the spade suit; sometimes taken as a portent of death. |
| ~ playing card | one of a pack of cards that are used to play card games. |
| n. (person) | 3. ace, adept, champion, genius, hotshot, maven, mavin, sensation, star, superstar, virtuoso, whiz, whizz, wiz, wizard | someone who is dazzlingly skilled in any field. |
| ~ expert | a person with special knowledge or ability who performs skillfully. |
| ~ track star | a star runner. |
| n. (substance) | 4. ace, angiotensin converting enzyme, angiotensin-converting enzyme | proteolytic enzyme that converts angiotensin I into angiotensin II. |
| ~ peptidase, protease, proteinase, proteolytic enzyme | any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis. |
| n. (group) | 5. ace, allied command europe | a major strategic headquarters of NATO; safeguards an area extending from Norway to Turkey. |
| ~ nato, north atlantic treaty organization | an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security. |
| ~ saceur, supreme allied commander europe | commanding officer of ACE; NATO's senior military commander in Europe. |
| ~ headquarters | (plural) a military unit consisting of a commander and the headquarters staff. |
| n. (act) | 6. ace | a serve that the receiver is unable to reach. |
| ~ serve, service | (sports) a stroke that puts the ball in play.; "his powerful serves won the game" |
| v. (social) | 7. ace, breeze through, nail, pass with flying colors, sail through, sweep through | succeed at easily.; "She sailed through her exams"; "You will pass with flying colors"; "She nailed her astrophysics course" |
| ~ make it, pass | go successfully through a test or a selection process.; "She passed the new Jersey Bar Exam and can practice law now" |
| v. (competition) | 8. ace | score an ace against.; "He aced his opponents" |
| ~ rack up, score, tally, hit | gain points in a game.; "The home team scored many times"; "He hit a home run"; "He hit .300 in the past season" |
| v. (competition) | 9. ace | play (a hole) in one stroke. |
| ~ golf, golf game | a game played on a large open course with 9 or 18 holes; the object is use as few strokes as possible in playing all the holes. |
| ~ play | participate in games or sport.; "We played hockey all afternoon"; "play cards"; "Pele played for the Brazilian teams in many important matches" |
| v. (competition) | 10. ace | serve an ace against (someone). |
| ~ lawn tennis, tennis | a game played with rackets by two or four players who hit a ball back and forth over a net that divides the court. |
| ~ serve | put the ball into play.; "It was Agassi's turn to serve" |
| adj. | 11. a-one, ace, crack, first-rate, super, tiptop, top-notch, topnotch, 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" |
| ~ 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" |
| trump card | | |
| n. (artifact) | 1. trump, trump card | a playing card in the suit that has been declared trumps.; "the ace of trumps is a sure winner" |
| ~ playing card | one of a pack of cards that are used to play card games. |
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