past one's prime

past one's prime idiom
Beyond the peak of one's powers, as in Jean still plays tennis but at 79 she's obviously past her prime. Also see the synonym over the hill; prime of life.

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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