/ Dictionary / Index S seismicity: Meaning and Definition of Find definitions for: seis•mic•i•ty Pronunciation: (sīz-mis'i-tē, sīs-), [key] — pl. -ties. the frequency, intensity, and distribution of earthquakes in a given area. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. seismic gap seismic sea wave Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language