- A single spot or pip on a playing card, die, or domino. (noun)
- A playing card, die, or domino having one spot or pip. (noun)
- In racket games: (noun)
- A serve that one's opponent fails to hit. (noun)
- A point scored by such a serve. (noun)
- Any die, domino, or any of four playing cards with one spot (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- A single spot or pip on a playing card, die, etc (noun)
- A winning serve that the opponent fails to reach (noun)
- A hole in one (noun)
- A fighter pilot accredited with destroying several enemy aircraft (noun)
- An expert or highly skilled person (noun)
- Superb; excellent (adjective)
- To serve an ace against (verb)
- To play (a hole) in one stroke (verb)
- To perform extremely well or score very highly in (an examination, etc) (verb)
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