flexes Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. bends or moves something to make it flexible. Example Sentence The bodybuilder flexes his muscles in front of the mirror. More Example Sentences The rubber band flexes when pulled. Synonyms bends; twists; stretches Antonyms stiffens; straightens; hardens Hear It! Say It! Write It! flexes Switch to cursive Start Share with your friends: