Definition: the reduction of overall body mass; may be due to disease, diet, or drugs; can be permanent or temporary, and may involve any tissue.
Synonyms (terms occurring on more labels are shown first): weight loss, weight decrease, weight decreased, decreased weight, weight reduction, body weight decreasing, loss of weight, decreased body weight, reduced body weight, lower body weight, lose weight, weightdecrease, weight re- duction, reduction Weight, decreasedweight, decrease in body weight
More information: PubMed search and possibly Wikipedia