/ Dictionary / Index S sonar: Meaning and Definition of Find definitions for: so•nar Pronunciation: (sō'när), [key] — n. a method for detecting and locating objects submerged in water by echolocation. the apparatus used in sonar. Also called, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sonar (Thesaurus) sonant sonarman Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language