Definition of "frenzy"

It is during these frenzies that sharks have been known to bite everything in sight, including other sharks engaged in the same activity.

1983, Richard Ellis, The Book of Sharks, Knopf, page 170

The early years of Norman occupation saw a frenzy of castle building.

1999, Linda Flavell, Roger Flavell, “1066[:] The Normans Begin to Erect Castles”, in dictionary of english down through the ages[:] words & phrases born out of historical events great & small, 2005 edition, London: Kyle Cathie Limited, page 17

All else is towering frenzy and distraction.

1712 (date written), [Joseph] Addison, Cato, a Tragedy. […], London: […] J[acob] Tonson, […], published 1713, Act I, scene ii, page 1

The poet's eye in a fine frenzy rolling.

c. 1595–1596 (date written), William Shakespeare, “A Midsommer Nights Dreame”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene i]

They thought that some frenzy distemper had got into his head.

1678, John Bunyan, The Pilgrim's Progress

Both goaded on to strife by frenzying hate.

1833, James Anthony Froude, Fraser's Magazine - Volume 7‎, page 456

Then there is the absorbing, not to say frenzying, interest, which attends our important elections.

1865, Gerrit Smith, Speeches and Letters of Gerrit Smith‎, page 14

The fresh smell of salt air, the sound of the crashing swell, the soothing immersion in the water, the sight of dolphins playing and fish frenzying beneath my board.

2009, Louise Southerden, Surf's Up: The Girl's Guide to Surfing‎