• IPA: /ˈheɪdeɪ/

heyday (plural heydays)

1. A period of success, popularity, or power; prime.

   The early twentieth century was the heyday of the steam locomotive.

2. (archaic) An exultation of the spirits; gaiety; frolic.

• day in the sun
• golden age
• golden years

• hey

• French: âge d’or
• German: Blütezeit
• Italian: auge
• Portuguese: auge
• Russian: расцве́т
• Spanish: auge

1. A lively greeting.
   • 1798, Jane Austen - Northanger Abbey:

     "Heyday, Miss Morland!" said he. "What is the meaning of this? I thought you and I were to dance together."

2. (obsolete) An expression of frolic and exultation, and sometimes of wonder.
   • 1600, Ben Jonson - Cynthia's Revels :

     "Come follow me, my wags, and say, as I say. There's no riches but in rags; hey day, hey day, &c."

   • 1749, Henry Fielding, The History of Tom Jones, a Foundling. In Six Volumes, volume (please specify ), London: Printed by A[ndrew] Millar, […], OCLC 928184292 ↗:

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     Here Jones, having ordered a servant to show a room above stairs, was ascending, when the dishevelled fair, hastily following, was laid hold on by the master of the house, who cried, “Heyday, where is that beggar wench going? Stay below stairs, I desire you.”

• (greeting) seeSynonyms en
• (expression of wonder) seeSynonyms en