/ Dictionary / Index I interpenetrate: Meaning and Definition of Find definitions for: in•ter•pen•e•trate Pronunciation: (in"tur-pen'i-trāt"), [key] — v. -trat•ed, -trat•ing. —v.t. to penetrate thoroughly; permeate. to penetrate with (something else) mutually or reciprocally. —v.i. to penetrate between things or parts. to penetrate each other. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: interpenetrate (Thesaurus) interpellation interpersonal Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language