/ Dictionary / Index R regimen: Meaning and Definition of Find definitions for: reg•i•men Pronunciation: (rej'u-mun, -men", rezh'-), [key] — n. a regulated course, as of diet, exercise, or manner of living, intended to preserve or restore health or to attain some result. regime (defs. 1, 2). government (def. 9). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: regimen (Thesaurus) regime regiment Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language