malnourish Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to provide insufficient or poor nutrition. Example Sentence The lack of growth of these children show they are malnourished. More Example Sentences Animals may malnourish without proper food. Synonyms starve; underfeed; deprive Antonyms nourish; feed; sustain Hear It! Say It! Write It! malnourish Switch to cursive Start Share with your friends: