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Define the word ace

ace \ace\ adj.
   1. of the highest quality an ace reporter

   Syn: A-one, first-class, first-rate, super, tip-top,
        topnotch(predicate)
        [WordNet 1.5]

ace \ace\ v.
   to get a grade of "A"; as, to ace an exam. [Colloq.]
   [PJC]

Ace \Ace\ ([=a]s), n.; pl. Aces ([=a]"s[e^]z). [OE. as, F. as,
   fr. L. as, assis, unity, copper coin, the unit of coinage.
   Cf. As.]
   [1913 Webster]
   1. A unit; a single point or spot on a card or die; the card
      or die so marked; as, the ace of diamonds.
      [1913 Webster]

   2. Hence: A very small quantity or degree; a particle; an
      atom; a jot.
      [1913 Webster]

            I 'll not wag an ace further.         --Dryden.
      [1913 Webster]

   3. (Sport) A single point won by a stroke, as in handball,
      rackets, etc.; in tennis, frequently, a point won by a
      service stroke.
      [Webster 1913 Suppl.]

   To bate an ace, to make the least abatement. [Obs.]

   Within an ace of, very near; on the point of. --W. Irving.
      [1913 Webster]

ace
     adj : 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" [syn: A-one, crack, first-rate,
            super, tiptop, topnotch, tops(p)]
     n 1: 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" [syn: one, 1, I,
           single, unity]
     2: one of four playing cards in a deck having a single pip on
        its face
     3: someone who is dazzlingly skilled in any field [syn: adept,
         champion, sensation, maven, mavin, virtuoso, genius,
         hotshot, star, superstar, whiz, whizz, wizard,
         wiz]
     4: a major strategic headquarters of NATO; safeguards an are
        extending from Norway to Turkey [syn: Allied Command Europe]
     5: a serve that the receiver is unable to reach
     v 1: succeed at easily; "She sailed through her exams"; "You will
          pass with flying colors"; "She nailed her astrophysics
          course" [syn: breeze through, pass with flying colors,
           sweep through, sail through, nail]
     2: score an ace against; "He aced his opponents"
     3: play (a hole) in one stroke
     4: serve an ace against (someone)

231 Moby Thesaurus words for "ace":
   A per se, I, air force, amigo, associate, atom, beaut, bedfellow,
   bedmate, best bower, bit, bomber pilot, bosom buddy, boss, bower,
   bowshot, brief span, buddy, bunkie, bunkmate, butty, camarade,
   cards, chamberfellow, champion, chief, chum, classmate,
   close quarters, close range, clubs, colleague, comate,
   combat pilot, commander, companion, company, compeer, comrade,
   confrere, consociate, consort, copartner, corker, crack,
   crackerjack, crony, crumb, dab, daisy, dandy, darb, dean, deck,
   deuce, diamonds, dilly, dole, dot, dram, dream, dribble, driblet,
   dummy, dwarf, earreach, earshot, face cards, farthing, fellow,
   fellow student, fighter pilot, first-rater, fleck, flush, flyboy,
   flyspeck, fragment, fugleman, full house, genius, girl friend,
   gobbet, good hand, gossip, grain, granule, great, groat, gunshot,
   hair, hair space, hairbreadth, hairsbreadth, hand, handful, head,
   hearts, higher-up, honey, humdinger, inch, iota, jack, joker, jot,
   killer-diller, king, knave, knockout, laureate, leader, left bower,
   little, little bit, little ways, lollapaloosa, lota, lulu,
   magician, mahatma, man of genius, master, master hand, mastermind,
   mate, messmate, military pilot, minim, minimum, minutiae, mite,
   modicum, molecule, monad, mote, naval pilot, no other, none else,
   nonpareil, nothing else, nought beside, nutshell, observer,
   old crony, one, one and only, ounce, pack, pair, pal, paragon,
   pard, pardner, particle, partner, past master, peach, pebble,
   picture cards, pinch, pip, pippin, pistol shot, pittance,
   playfellow, playing cards, playmate, point, practiced hand,
   principal, prodigy, queen, roommate, round, royal flush, rubber,
   ruff, ruler, sage, schoolfellow, schoolmate, scruple, senior,
   shipmate, short distance, short piece, short way, side partner,
   sidekick, singleton, skilled hand, smidgen, smitch, spades, span,
   speck, spitting distance, spoonful, spot, star, step, straight,
   suicide pilot, superior, superman, superstar, sweetheart, teammate,
   the greatest, the most, the nuts, thimbleful, tiny bit, tittle,
   top dog, topnotcher, trey, trick, trifling amount, trivia, trump,
   unit, virtuoso, whisker, whit, whiz, wizard, workfellow,
   yokefellow, yokemate

ACE
     Access Control Entry (AD)
     
     

ACE
     Advanced Computing Environment (manufacturer)
     
     

ACE
     ASCII Compatible Encoding (ASCII, Internet, DOMAIN)
     
     

ACE
     Autonomous Computer Engine (WD)
     
     

ACE
     
        1. Advanced Computing Environment.
     
        2. Adaptive Communication Environment.