straightening Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. 1 to make or become straight; 2 to put right; repair Example Sentence Reina was straightening up her room. Synonyms clean up one's act; repair; right; tidy Antonyms bend; curve; flex; hunch; mess Hear It! Say It! Write It! straightening Switch to cursive Start Share with your friends: