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heyday definition

hey·day (hā′dā′)

noun

the time of greatest health, vigor, success, prosperity, etc.; prime

Etymology: ME hei dai, full daylight, well on in the day < hei, high + dai, day

interjection

Archaic used to express surprise, joy, or wonder

Etymology: earlier heyda prob. < (or akin to) Ger & Dan heida, Du heidaar, hey there!: see hey

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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