heyday Meaning, Definition & Usage

  1. noun the period of greatest prosperity or productivity
    prime; flower; blossom; efflorescence; peak; flush; bloom.

WordNet

Hey"day` interjection
Etymology
Cf. G. heida, or hei da, D. hei daar. Cf. Hey, and There.
Definitions
  1. An expression of frolic and exultation, and sometimes of wonder. B. Jonson.
Hey"day` noun
Etymology
Prob. for. high day. See High, and Day.
Definitions
  1. The time of triumph and exultation; hence, joy, high spirits, frolicsomeness; wildness.
    The heyday in the blood is tame. Shak.
    In the heyday of their victories. J. H. Newman.

Webster 1913