• WordNet 3.6
    • n heyday the period of greatest prosperity or productivity
    • ***
Webster's Revised Unabridged Dictionary
    • interj Heyday An expression of frolic and exultation, and sometimes of wonder.
    • n Heyday The time of triumph and exultation; hence, joy, high spirits, frolicsomeness; wildness. "The heyday in the blood is tame.""In the heyday of their victories."
    • ***
Century Dictionary and Cyclopedia
    • heyday An exclamation of cheerfulness, surprise, wonder, etc.
    • n heyday Highest vigor; full strength; acme.
    • ***
Chambers's Twentieth Century Dictionary
    • interj Heyday expressive of frolic, exultation, or wonder
    • ***


Webster's Revised Unabridged Dictionary
Cf. G. heida, or hei da, D. hei daar,. Cf. Hey, and There
Chambers's Twentieth Century Dictionary


In literature:

In its heyday Brambletye must have been a very fine place.
"Highways & Byways in Sussex" by E.V. Lucas
In his heyday he had a small estate, which he had spent like a gentleman, by mixing with the gay world.
"St. Ronan's Well" by Sir Walter Scott
It was the heyday of the Ten Pound Householder and the Middle Class Franchise.
"Fifteen Chapters of Autobiography" by George William Erskine Russell
The strategic importance of Antibes during the heyday of the Bourbon Empire is attested by the Vauban fortifications.
"Riviera Towns" by Herbert Adams Gibbons
Only in experience of the frivolities of existence was he deficient, his education there having been cut off in its heyday.
"The Genius" by Margaret Horton Potter
Very much so, to be beating a poor woman, and me, a slave, who didn't dare strike him in return; heyday!
"The Comedies of Terence" by Publius Terentius Afer, (AKA) Terence
In 1817 the Laocoon was in the heyday of its fame, and was regarded as the supreme achievement of ancient art.
"The Works of Lord Byron, Volume 2" by George Gordon Byron
Centuries of anguish have flooded through my bosom, even in the heyday of existence.
"Blackwood's Edinburgh Magazine - Volume 62, No. 384, October 1847" by Various
Any woman can keep a house or manage a babe: heyday, can she so?
"Joyce Morrell's Harvest" by Emily Sarah Holt
Then they are in the heyday of blackbird life.
"Birds of the Rockies" by Leander Sylvester Keyser
Dr Schweinfurth has given a vivid picture of this man in the heyday of his power.
"The Life of Gordon, Volume I" by Demetrius Charles Boulger
She comes, in heyday of her blood, Over the groves and waiting flood!
"Song-waves" by Theodore H. Rand
In the heyday of my youth I could fly around the world in five hours.
"David and the Phoenix" by Edward Ormondroyd
In the heyday of his London success he has not truckled to Rank, or Influence, or Affluence.
"The Dop Doctor" by Clotilde Inez Mary Graves
It is the heyday of insect life.
"The Atlantic Monthly, Volume 15, No. 91, May, 1865" by Various
The heyday of their prosperity comes in that moment when assaults upon men and property are most frequent.
"Violence and the Labor Movement" by Robert Hunter
Would you could have shared our heyday at the dawning!
"The Kempton-Wace Letters" by Jack London
But I was in the very heyday of life, and had no wish ungratified.
"The Price of the Prairie" by Margaret Hill McCarter
Time was, when the "light-horsemen" of the river were in their heyday, that L25,000 worth of property was stolen annually.
"Scotland Yard" by George Dilnot
Now and then, a man of wealth in the heyday of youth adopts the tenet of broadest freedom.
"The Voice of Science in Nineteenth-Century Literature" by Various

In poetry:

Learn this—that philosophy beats
Sure time with the pulse,—quick or slow
As the blood from the heyday retreats,—
But it cannot make gods of us—No!
"To A Moralist" by Friedrich von Schiller
Make the best of all things,--
That is Wisdom's word;
In the day of small things
Is its comfort heard,--
And its blessing soothes not less
Any heyday of success.
"A Word Of Wisdom" by Martin Farquhar Tupper

In news:

Deftones evolves into heavy remnant of heyday with'Koi.
Major news stations across the country are having a heyday with beef these days.
Jaclyn Smith Remembers the Heavenly Heyday of "Charlie's Angels".
FORT LEE, NJ — While the Fort Lee School District might only boast 18 custodians, down from nearly 50 in its heyday, those that remain are still an intricate part of the education process, according to the Fort Lee Patch.
The Archers in their indie heyday.
Here's a pictorial look back at the heyday of the Fab Four.
The account of Marvel 's early '60s heyday, when Lee and nascent legend Jack Kirby whipped up the bulk of Marvel 's biggest names, feels sunny and full of promise.
Last- mile 's media heyday was strongly linked to the dotcom bubble.
Sihanouk's son, the current King Norodom Sihamoni, presides over an institution that is far less relevant or powerful than it was in his father's heyday.
Purportedly "the most trusted person in America" during his heyday in the 1960s and '70s, Cronkite personified journalistic influence as a stabilizing force in American public life.
Even during their heyday in the early 80s, Philadelphia band the Stick Men were pretty obscure, and the past three decades have only made matters worse—which really saddens me.
Giving editorial guidance to Mary Gherty and Kim Heyday.
The heyday of Somali piracy may be over, recent ransom figures show.
During the postwar heyday of physics, C.P.

In science:

During the heyday of logical empiricism, many influential people denied that distinct and incompatible but empirically equivalent theories existed [Glymour, 1970].
Empirical Equivalence, Artificial Gauge Freedom and a Generalized Kretschmann Objection
There is a salutary warning from the history of British Emergentists, who had their heyday in the early 1920s — Brian McLaughlin’s book.64 The notion of emergence has been found to be a useful concept from at least the time of John Stuart Mill, back in the nineteenth century.
Definability in the Real Universe
Of course the British emergentists experienced their heyday before the great quantum discoveries of the late 1920s, and as described in McLaughlin,64 this was in a sense their undoing.
Definability in the Real Universe
Improvement of physics teaching in the heyday of the 1960’s.
Lessons From the Physics-Education Reform Effort
Historically, a low-energy theorem (LET) for the electric dipole amplitude was derived in the heydays of current algebra under certain analyticity (smoothness) assumptions [108, 109].
Chiral perturbation theory