Princeton's WordNet(4.60 / 5 votes)Rate this definition: 1  operation(noun) the state of being in effect or being operative. 2  operation(noun) a business especially one run on a large scale. 3  operation(noun) a planned activity involving many people performing various actions.
Tomatoes are a nutrient-dense food, meaning they are jam-packed with nutrients, but don't have a lot of calories. Lipids, carbs and protein are the three types of macronutrients your body breaks down for energy. The primary macronutrient in tomatoes is carbohydrates, although they do have trace amounts of fat and protein.
Tomatoes are rich in vitamin A and potassium and low in calories, which is probably enough to qualify as a nutrient-dense superfood. Tomatoes are also rich in an antioxidant called lycopene that may reduce damage done by free radicals and has been linked to lower risks of some forms of cancer.