/ Dictionary / Index O ostensive definition: Meaning and Definition of Find definitions for: osten'sive defini'tion Pronunciation: [key] — Philos. Philos. the definition of a term by pointing to one or more examples to which the term can be applied. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ostensive ostensorium Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language