0 the most successful or popular period of someone or something: --
1 a period of great success, popularity, or power: --
In its heyday, Pittsburgh was a center of the steel and coal industries.
However, even in the heyday of "the party period" there existed a sizable population of voters with shallow partisan moorings.
This orphanage, which was founded in 1579, accommodated approximately 175 orphan boys and girls in its heyday in the seventeenth century.#!
After the initial heydays in the 1980s and early 1990s, the interest in qualitative simulation has subsided a bit.
That the spectatorship for different types of theatrical offerings was expanding during the heyday of operatic burlesque is worthy of note for several reasons.
During the heyday of positivism, it was quite the rage.
Even in their heyday, people sometimes winked and leered at their seemingly retrograde approaches to life.
Their heyday seemed to have been in the fifties, just as they were emerging to prominence, although their greatest successes would come later on.
In their heyday, the inns of court appear to have played a vital role in fostering the proliferation of legal texts alongside legal learning.
