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  • A game
    A game
    noun
    a person’s best effort, abilities, or achievement.
  • 'A' game
    'A' game
    noun
    one's best possible performance, esp in the phrase to bring or take one's 'A' game

A game

American  
Or A-game,

noun

Informal.

  1. a person’s best effort, abilities, or achievement.

    The candidate brought her A game to the debate.
'A' game British  

noun

  1. informal one's best possible performance, esp in the phrase to bring or take one's 'A' game

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of A game

In reference to a sports contest, with the letter A indicating peak performance

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.