/ Dictionary / Index C cir.: Meaning and Definition of Find definitions for: cir. Pronunciation: [key] about:[< L circā, circiter, circum] cir. 1800. circular. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cippus circ Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language