/dis'kon tn ooh"i tee, -yooh"-/ , n. , pl. discontinuities .
1. lack of continuity; irregularity: The plot of the book was marred by discontinuity.
2. a break or gap: The surface of the moon is characterized by major discontinuities.
3. Math. a point at which a function is not continuous.
4. Geol. a zone deep within the earth where the velocity of earthquake waves changes radically.
[ 1560-70; discontinuitas. See DISCONTINUOUS, -ITY ]