/ Dictionary / Index C collun.: Meaning and Definition of Find definitions for: collun. Pronunciation: [key] (in prescriptions) a nose wash. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. collude collunarium 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