/ Dictionary / Index R regime: Meaning and Definition of Find definitions for: re•gime Pronunciation: (ru-zhēm', rā-, or, sometimes, -jēm'), [key] — n. a mode or system of rule or government: a dictatorial regime. a ruling or prevailing system. a government in power. the period during which a particular government or ruling system is in power. regimen (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: regime (Thesaurus) regicide regimen Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language