/ Dictionary / Index O overdose: Meaning and Definition of Find definitions for: o•ver•dose Pronunciation: (n.ō'vur-dōs"v.ō'vur-dōs", ō"vur-dōs'), [key] — -dosed, -dos•ing. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: overdose (Thesaurus) overdoor overdraft Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language