/ Dictionary / Index A -acity: Meaning and Definition of Find definitions for: -acity Pronunciation: [key] a complex noun suffix meaning “quality of ” or “abounding in the characteristic of,” appearing in loanwords from Latin: tenacity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Acis ack. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language