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The meaning of HEYDAY is the period of one's greatest popularity, vigor, or prosperity. How to use heyday in a sentence. Did you know?

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HEYDAY definition: (used as an exclamation of cheerfulness, surprise, wonder, etc.) See examples of heyday used in a sentence.

Higher and lower points of achievement (Definition of heyday from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Definition of heyday noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 14, 2025 · heyday (plural heydays) A period of success, popularity, or power; prime. quotations The early twentieth century was the heyday of the steam locomotive.

A heyday is a peak of popularity or success. If you hear someone say "Hey! Back in the day, I was the best boxer in the city! No one could beat me!" he might be remembering his heyday as a fighter.

Someone's heyday is the time when they are most powerful, successful, or popular. In its heyday, the studio's boast was that it had more stars than there are in heaven.

• The building had originally been a manor house and must have looked beautiful in its heyday. • In its heyday it must have been a good little vehicle, but now it was definitely finished.