carbohydrates meaning
noun. Bread is a source of carbohydrates. Bread is a source of carbohydrates. The definition of a carbohydrate is an organic compound that occurs in living tissues or food and that can be broken down into energy by people or animals.arbohydrate. noun. Any of a group of organic compounds that includes sugars, starches, celluloses, and gums and serves as a major energy source in the diet of animals. These compounds are produced by photosynthetic plants and contain only carbon, hydrogen, and oxygen, usually in the ratio 1:2:1.