Dictionary Definition: unsaturated fat
- unsaturated fat
- Unsaturated fats are liquid at room temperature. Vegetable oils are a major source of unsaturated fat in the diet. Unsaturated fats include polyunsaturated fats and monounsaturated fats. Other foods, such as avocados, fatty fish like salmon and tuna, most nuts, and olives are good sources of unsaturated fat.