/ Dictionary / Index C clarion: Meaning and Definition of Find definitions for: clar•i•on Pronunciation: (klar'ē-un), [key] — adj. clear and shrill: the clarion call of a battle trumpet. —n. an ancient trumpet with a curved shape. the sound of this instrument. any similar sound. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: clarion (Thesaurus) clarino Clarissa Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language