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or heydey

[hey-dey] /ˈheɪˌdeɪ/
the stage or period of greatest vigor, strength, success, etc.; prime:
the heyday of the vaudeville stars.
Archaic. high spirits.
Origin of heyday1
1580-90; variant of high day, apparently by confusion with heyday2


[hey-dey] /ˈheɪ deɪ/
interjection, Archaic.
(used as an exclamation of cheerfulness, surprise, wonder, etc.)
1520-30; rhyming compound based on hey; replacing heyda < German hei da hey there Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for heyday
Contemporary Examples
Historical Examples
  • Then we see in the heyday of youth and poetry that it may be true, that it is true in gleams and fragments.

    Essays, First Series Ralph Waldo Emerson
  • If childhood is the sunrise of life, youth is the heyday of life's ruddy June.

    Gov. Bob. Taylor's Tales Robert L. Taylor
  • In the heyday of my youth I could fly around the world in five hours.

    David and the Phoenix Edward Ormondroyd
  • As for the princess—well, you're young; in the heyday for such nonsense.

    Under the Rose

    Frederic Stewart Isham
  • They would not have troubled her in the heyday of her youth!

    The Buffalo Runners R.M. Ballantyne
British Dictionary definitions for heyday


the time of most power, popularity, vigour, etc; prime
Word Origin
C16: probably based on hey
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
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Word Origin and History for heyday

late 16c., alteration of heyda (1520s), exclamation of playfulness or surprise, something like Modern English hurrah, apparently an extended form of Middle Elish interjection hey or hei (see hey). Modern sense of "stage of greatest vigor" first recorded 1751, which altered the spelling on model of day, with which this word apparently has no etymological connection.

Online Etymology Dictionary, © 2010 Douglas Harper
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