yam Get Printable Handwriting (yam) 1 syllables Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. 1 the starchy tuberous root of any of various climbing vines of the genus Dioscorea; 2.sweet potato with deep orange flesh that remains moist when baked Example Sentence A yam is similar to a sweet potato. Synonyms tuber; tuberous root; Dioscorea Antonyms jam Hear It! Say It! Write It! yam Switch to cursive Start Share with your friends: