Idioms and Phrases with at one's best
at one's best
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® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.