What does "heyday" mean?

Heyday: An expression of frolic and exultation, and sometimes of wonder. B. Jonson.

Additional senses

  1. 2.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.

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