/ əʊˈbiːs; NAmE oʊ-/ adjective
( formal or medical ) ( of people ) very fat, in a way that is not healthy
► obes·ity / əʊˈbiːsəti; NAmE oʊ-/ noun [ U ]:
Obesity can increase the risk of heart disease.
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WORD ORIGIN
mid 17th cent.: from Latin obesus having eaten until fat, from ob- away, completely + esus (past participle of edere eat).