/ Dictionary / Index O overtax: Meaning and Definition of Find definitions for: o•ver•tax Pronunciation: (ō"vur-taks'), [key] — v.t. to tax too heavily. to make too great demands on. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: overtax (Thesaurus) overtake over-the-air Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language