Ace /(ās)/

Ace

n.

pl. Aces ((ā"sĕz))

  1. A unit; a single point or spot on a card or die; the card or die so marked; as, the ace of diamonds.
  2. Hence: A very small quantity or degree; a particle; an atom; a jot.
    I 'll not wag an ace further.
  3. A single point won by a stroke, as in handball, rackets, etc.; in tennis, frequently, a point won by a service stroke. (Sport)

Phrases & Compounds
To bate an ace
to make the least abatement. [Obs.]
Within an ace of
very near; on the point of.

ace

adj.
  1. of the highest quality

ace

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