conch shell Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a large spiral shell from a sea snail. Example Sentence He found a conch shell on the beach. More Example Sentences He blew into the conch shell loudly. Synonyms shell; mollusk shell Antonyms mammal Hear It! Say It! Write It! conch shell Switch to cursive Start Share with your friends: