caverns Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a large cave or a large chamber in a cave; any large dark enclosed space;verb. hollow out as if making a cavern Example Sentence We found bats hanging in the dark caverns. Synonyms cave; cavity; den; grotto Antonyms bright open space Hear It! Say It! Write It! caverns Switch to cursive Start Share with your friends: