Pronunciation: (in"tur-pen'i-trāt"), [key]
—v. -trat•ed, -trat•ing.
1. to penetrate thoroughly; permeate.
2. to penetrate with (something else) mutually or reciprocally.
1. to penetrate between things or parts.
2. to penetrate each other.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.