Slim down - definition of slim down by the free dictionary, Slim down vb (adverb) 1. to make or become slim, esp intentionally 2. (economics) to make (an organization) more efficient or (of an organization) to become more .. Slim | definition of slim by merriam-webster, She looked slim and fit for her age. he has a slim build. i was a lot slimmer in those days. they have only a slim chance of winning.. Disease | definition of disease by medical dictionary, Disease [dĭ-zēz´] a definite pathological process having a characteristic set of signs and symptoms. it may affect the whole body or any of its parts, and its ..