opt Get Printable Handwriting (opt) 1 syllables Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to make a choice or decision. Example Sentence She decided to opt out of doing the extra credit assignment. More Example Sentences You may opt to join the club. Synonyms choose; select Antonyms put off Hear It! Say It! Write It! opt Switch to cursive Start Share with your friends: