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Synonyms

heyday

1 American  
[hey-dey] / ˈheɪˌdeɪ /
Or heydey

noun

  1. the stage or period of greatest vigor, strength, success, etc.; prime.

    the heyday of the vaudeville stars.

  2. Archaic. high spirits.


heyday 2 American  
[hey-dey] / ˈheɪ deɪ /

interjection

Archaic.
  1. (used as an exclamation of cheerfulness, surprise, wonder, etc.)


heyday British  
/ ˈheɪˌdeɪ /

noun

  1. the time of most power, popularity, vigour, etc; prime

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of heyday1

1580–90; variant of high day, apparently by confusion with heyday 2

Origin of heyday2

1520–30; rhyming compound based on hey; replacing heyda < German hei da hey there

Explanation

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. If you remember a time in the past when you were doing something really well or getting a lot of attention or fame, you might be reminiscing about your heyday. A person or an organization — and even a thing — can have a heyday, or a peak time when everything goes well. The good news is that a heyday can come again and again, so while your heyday as student president might be just a memory, there might be a heyday as governor of your state years later.

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Vocabulary lists containing heyday

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

West also was an executive for the Golden State Warriors in their heyday, providing crucial advice on player personnel.

From Los Angeles Times • Apr. 14, 2026

The political formation enjoyed a heyday for a number of years before sinking into a glacial decline, its currency dwindling in most places except for Bluesky, where it still thrives.

From Slate • Apr. 13, 2026

The subsequent investigation under New York’s Martin Act brought down the Consolidated, and helped end the heyday of the bucket shop.

From Barron's • Apr. 7, 2026

And at this weekend’s Final Four, Hurley will attempt to do something that no program has managed since the heyday of John Wooden’s UCLA: Win three championships in four years.

From The Wall Street Journal • Apr. 3, 2026

Like Silicon Valley in the heyday of the Internet bubble, London was the center of a speculative mania about the Americas.

From "1491" by Charles C. Mann