Definition of yam
- yam Noun Any climbing vine of the genus "Dioscorea" in the Eastern and Western hemispheres, usually cultivated
- yam Noun The edible, starchy, tuberous root of that plant, a tropical staple food.
- yam Noun A sweet potato; a tuber from the genus "Ipomoea".
- yam Noun Potato.
- yam Noun home.