/ Dictionary / Index S suppositive: Meaning and Definition of Find definitions for: sup•pos•i•tive Pronunciation: (su-poz'i-tiv), [key] — adj. of the nature of or involving supposition; suppositional. supposititious or false. expressing or noting supposition, as the words if, granting, or provided. —n. a suppositive word. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. supposititious suppository Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language