phase out Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to gradually stop using something. Example Sentence They plan to phase out the olf model over the next year. More Example Sentences The school will phase out the program. Synonyms discontinue; remove; eliminate Antonyms introduce; start; begin Hear It! Say It! Write It! phase out Switch to cursive Start Share with your friends: