terraform Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to modify a planet's environment to support life. Example Sentence We need to terraform Mars to make it habitable. More Example Sentences They plan to terraform the atmosphere of Venus. Synonyms modify; transform; change Antonyms preserve; maintain Hear It! Say It! Write It! terraform Switch to cursive Start Share with your friends: