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 a good source of fiber, providing about 1.5 grams per average sized tomato. Most of the fibers (87%) in tomatoes are insoluble, in the form of hemicellulose, cellulose and lignin (2). Bottom line: Fresh tomatoes are low in carbs (4%). The carb content consists mainly of simple sugars and insoluble fibers.