null and void Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. having no legal force or effect. Example Sentence This contract becomes null and void at noon tomorrow. More Example Sentences They found the agreement to be null and void. Synonyms invalid; canceled; ineffective Antonyms valid; effective; binding Hear It! Say It! Write It! null and void Switch to cursive Start Share with your friends: