/ Dictionary / Index D detrimental: Meaning and Definition of Find definitions for: det•ri•men•tal Pronunciation: (de"tru-men'tl), [key] — adj. causing detriment; damaging; harmful. —n. a detrimental person or thing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: detrimental (Thesaurus) detriment detrition Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language