criminalize Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to make illegal or a crime. Example Sentence The government plans to criminalize the possession of certain drugs. More Example Sentences Some laws aim to criminalize certain behaviors. Synonyms proscribe; outlaw; ban Antonyms legalize; permit; allow Hear It! Say It! Write It! criminalize Switch to cursive Start Share with your friends: