noun(usually one's heyday)
- The period of a person’s or thing’s greatest success, popularity, activity, or vigour: the paper has lost millions of readers since its heyday in 1964More example sentences
- In its heyday, only 30 years ago, just under 1,000 trawlers operated from the port.
- Over three million people walked through its door every year in its heyday before the war.
- You have to go back 10 years, to the heyday of Radio 1, to find a station with a bigger audience.
late 16th century (denoting good spirits or passion): from archaic heyday!, an exclamation of joy, surprise, etc..