/ Dictionary / Index D disconcert: Meaning and Definition of Find definitions for: dis•con•cert Pronunciation: (dis"kun-sûrt'), [key] — v.t. to disturb the self-possession of; perturb; ruffle: Her angry reply disconcerted me completely. to throw into disorder or confusion; disarrange: He changed his mind and disconcerted everybody's plans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: disconcert (Thesaurus) discomycota disconfirm Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language