affects Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to act upon so as to cause a response; to be the business or affair of Example Sentence The study of how music affects our lives is called musicology. Synonyms impact; influence; impress; concern Antonyms bore; tire Hear It! Say It! Write It! affects Switch to cursive Start Share with your friends: