/ Dictionary / Index O overfatigue: Meaning and Definition of Find definitions for: o•ver•fa•tigue Pronunciation: (ō'vur-fu-tēg") [key] — n. excessive tiredness from which recuperation is difficult. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: overfatigue (Thesaurus) overfalls overfeed Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language