(es)  [f. prec.] 

    1. [cf. prec., 1d.] trans. To score an ace against (an opponent); to gain an ace by playing (the ball).
 
  1923 Glasgow Herald 9 July 11 [Tennis] His breezy attack, in which the desire to ‘ace’ his adversary at every stroke was the dominating factor. 1927 Daily Express 21 May 9/2 Eight times Tilden aced his service ball.
 

    2. [cf. prec., 2d.] To achieve high marks in (an examination, etc.). Also fig. and to ace it. U.S. slang.
 
  1959 Amer. Speech XXXIV. 156 To make a perfect score on a test is to ace it. 1962 C. L. BARNHART in Householder & Saporta Probl. in Lexicogr. 170 Ace... Informal. To achieve a high mark in: He aced the examination. 1966 MRS. L. B. JOHNSON White House Diary 18 Jan. (1970) 354 Luci walked in..happy as a lark, saying, ‘Mama, I probably aced it!’ (her zoology final). 1983 Verbatim Winter 4/1 Hall..was apparently acing his courses in Latin, Greek, and Rhetoric. 1986 New Yorker 10 Nov. 95/1, The flight was over almost before it started. ‘Our tradition is ‘Give us a few seconds and we'll ace it.’..But this time we had no chance.’