/ Dictionary / Index D defaulter: Meaning and Definition of Find definitions for: de•fault•er Pronunciation: (di-fôl'tur), [key] — n. a person who defaults or fails to fulfill an obligation, esp. a legal or financial one. a soldier convicted by court-martial. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: defaulter (Thesaurus) default DEFCON Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language