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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.

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'A' game British  

noun

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

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Etymology

Origin of A game

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

Example Sentences

He made his return to rugby in an England A game against France but was red-carded for a high shot on Antoine Hastoy.

From BBC • Feb. 6, 2026

"A game like this, you can't dwell into it too much," said vice-captain Pant, who took charge of the team after Gill was forced out.

From Barron's • Nov. 16, 2025

A game of big runs, momentum shifts and high emotions needed a resolution in the renewal of an old rivalry.

From Los Angeles Times • Nov. 15, 2025

So everybody brought their A game to the session and we took it really seriously, but we also had a lot of fun and just really kind of got to know each other.

From Los Angeles Times • Nov. 4, 2025

“All of you, back to your cabins. Get some sleep. A game well played, but curfew is past!”

From "The Battle of the Labyrinth" by Rick Riordan