shut up Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. andadjective. refuse to talk or stop talking; fall silent Example Sentence It is not nice to tell anyone to shut up. Synonyms close; close-up" class="word-page__definition-link">close up; clam up Antonyms speak Hear It! Say It! Write It! shut up Switch to cursive Start Share with your friends: