/ Dictionary / Index T Tosca*: Meaning and Definition of Find definitions for: Tos•ca Pronunciation: (tos'ku It. tôs'kä), [key] — n. an opera (1900) by Giacomo Puccini. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Toryism Toscana Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language