phrensy, frenzy 1. Mental derangement; delirium, or temporary insanity; in later use chiefly the uncontrollable rage or excitement of paroxysm of mania. 2. Agitation or disorder of the mind likened to madness; a state of delirious fury, rage, enthusiasm, or the like; also, wild folly, distraction, craziness. 3. A crazy notion or wild idea; also, a ... Found on http://www.wordinfo.info/words/index/info/view_unit/2619/6