/ Dictionary / Index C Callisto: Meaning and Definition of Find definitions for: Cal•lis•to Pronunciation: (ku-lis'tō), [key] — n. a nymph attendant on Artemis, punished for a love affair with Zeus by being changed into a bear and then transformed into stars as the constellation Ursa Major. a large natural satellite of the planet Jupiter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: callisto (Thesaurus) callisthenics Callistus I Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language