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Definition of heyday

heyday

/ˈheɪ.deɪ/
hey · day
Plural:heydays
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heyday Lexical Profile

heyday Game Scores & Validity

• noun

1

The period of a person's or thing's greatest success, popularity, vigor, or prosperity.

Example

"In its 19th-century heyday, the port city was a bustling hub for international maritime trade."

Synonyms
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Antonyms
View all antonyms for heyday

Word Nuance & Usage

Do not spell this word as "hayday"; despite a common folk etymology linking it to harvesting hay, it has no connection to the crop and is almost always used in the singular with a possessive determiner (e.g., "in its heyday").

• Rhymes for heyday

• Nearby Words

hexagon
hexagonal
hey
heyday
hi
hiatus
hibachi

Word Origin & Etymology

Originating in the late 16th century from the exclamation "heyday" (expressing joy or surprise), the second syllable was later altered by folk association with the noun "day" to denote a period of peak vigor and prosperity.

Cite this Entry

Wordmom. (2026). Definition of Heyday. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/heyday
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