obesity

n. state of being excessively overweight

Obesity is a condition in which the natural energy reserve, stored in the fatty tissue of humans and other mammals, is increased to a point where it is associated with certain health conditions or increased mortality.Although obesity is an individual clinical condition, it is increasingly viewed as a serious and growing public health problem: excessive body weight has been shown to predispose to various diseases, particularly cardiovascular diseases, diabetes mellitus type 2, sleep apnea and osteoarthritis.
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Obesity is an abnormal accumulation of body fat, usually 20% or more over an individual's ideal body weight. [more]Obesity - Community and Resources

Noun
1. more than average fatness
(synonym) fleshiness
(hypernym) fatness, fat, blubber, avoirdupois
(hyponym) corpulence, overweight, stoutness, adiposis

(n.)
The state or quality of being obese; incumbrance of flesh.