thwartwise Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. in a direction that is opposite or sideways. Example Sentence The car was parked thwartwise across two parking spaces. More Example Sentences They arranged the chairs thwartwise for the game. Synonyms sideways; crosswise Antonyms straight; parallel Hear It! Say It! Write It! thwartwise Switch to cursive Start Share with your friends: