/ Dictionary / Index O offlap: Meaning and Definition of Find definitions for: off•lap Pronunciation: (ôf'lap", of'-), [key] — n. Geol. the retreat of a sea from its shore. a sequence of layers of sedimentary rock formed during a retreat of the sea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. off-key off-license Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language