Grade 1 nail Get Printable Handwriting (nail) 1 syllables Learn It! Spelling Test Definition noun. 1 a thin pointed piece of metal that is hammered into materials as a fastener; 2 horny plate covering and protecting part of the dorsal surface of the digits Example Sentence I hit the nail with a hammer. Synonyms fastener; screw; fastening Antonyms hammer Share with your friends: