/ Dictionary / Index P posit: Meaning and Definition of Find definitions for: pos•it Pronunciation: (poz'it), [key] — v.t. to place, put, or set. to lay down or assume as a fact or principle; postulate. —n. something that is posited; an assumption; postulate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: posit (Thesaurus) posigrade rocket position 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