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1. Of, relating to, or characteristic of an orgy.
2. Arousing or causing unrestrained emotion; frenzied.

[Greek orgiastikos, from orgiastēs, celebrant of orgies, from orgiazein, to celebrate orgies, from orgia, orgies; see orgy.]

or′gi·ast′ n.
or′gi·as′ti·cal·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


a participant in an orgy
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
I, whose sexual nature is to cling to one woman like a child embracing the universe, am driven by my destiny to be the orgiast ..." These contradictions were later resolved, I believe, by the disarming announcement of a new modesty in The Armies of the Night (1968) when Mailer recognizes that he would, at 45, no longer be capable of being an armed revolutionary, because he was too old, fat, and well-known; and again in The Fight (1975) when, after a riff on how the lion he hears on returning alone from late night roadwork with Muhammad Ali must be "Hemingway's own lion" waiting for a suitable surrogate, he realizes that the animal is a caged one in the local zoo, but puts the self-deprecating story into the book nonetheless.
What is certain is that something about Salome brings out the orgiast in directors.
The healthy masculinity of the twenty-one-year-old male should be in full vigor; his is withered and flabby, devolved into the fractured spendings of the shopaholic, the gambler, the epicure, and the orgiast.