CraterPronunciation: /ˈkreɪtə/ AstronomyDefinition of Crater a small and faint southern constellation (the Cup), between Hydra and Leo, said to represent the goblet of Apollo. (as genitive Crateris /krəˈtɛrɪs/) used with preceding letter or numeral to designate a star in this constellation:the star Delta CraterisOrigin:Latin, from Greek, 'mixing bowl'Crater in other Oxford dictionaries Definition of Crater in the US English dictionary