/ Dictionary / Index C caldera: Meaning and Definition of Find definitions for: cal•de•ra Pronunciation: (kal-der'u, kôl-), [key] — n. a large, basinlike depression resulting from the explosion or collapse of the center of a volcano. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: caldera (Thesaurus) Calder Calderón de la Barca Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language