at one's best

at one's best idiom
In one's most excellent state or condition. For example, The photographer tried hard to show the bride at her best. [1500s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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