/ Dictionary / Index D discontinuity: Meaning and Definition of Find definitions for: dis•con•ti•nu•i•ty Pronunciation: (dis"kon-tn-'i-tē, -y'-), [key] — pl. -ties. lack of continuity; irregularity: The plot of the book was marred by discontinuity. a break or gap: The surface of the moon is characterized by major discontinuities. a point at which a function is not continuous. a zone deep within the earth where the velocity of earthquake waves changes radically. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: discontinuity (Thesaurus) discontinue discontinuous Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language