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 often considered a vegetable, though in actuality they are a citrus fruit. Tomatoes are an incredibly versatile food. They are delicious eaten raw, in salads or on sandwiches, and take on a wonderful sweetness when cooked. Their high acid content makes them a perfect food for canning.