Both Overweight and Obesity imply a condition of excess weight in a human being.
The term Overweight is generally used to indicate the excess weight while Obese refers to excess fat. Being overweight means having more body weight than is considered normal or healthy for one’s age or build. On the other hand, Obesity is the condition of being obese, i.e., excess amount of body fat. While an overweight person will carry excess weight, he may or may not have excess accumulation of fat.