a person’s best effort, abilities, or achievement: The candidate brought her A game to the debate.
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How to use A game in a sentence
Some have suggested Letterman needed Leno as competition to bring his A-game night after night.Yes, Stephen Colbert Will Be Great as Host of CBS’s ‘Late Night’ | Pete Dominick | April 10, 2014 | THE DAILY BEAST
Working with a guy like Željko is like playing basketball with an NBA star—you have to bring your A-game.
Celebrate your birthday by showing those birds the three-men-to-a-game stunt.Baseball Joe, Captain of the Team | Lester Chadwick
Around the point of the hill to my right-where the herd had gone-A game trail dropped steeply to this bench.The Land of Footprints | Stewart Edward White
British Dictionary definitions for 'A' game
mainly US and Canadian 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