obesity

noun

obe·​si·​ty ō-ˈbē-sə-tē How to pronounce obesity (audio)
Synonyms of obesitynext
: a condition characterized by the excessive accumulation and storage of fat in the body
Obesity affects not just appearance, but disease processes as well.Malorye Allison

Examples of obesity in a Sentence

obesity has been linked to a number of health risks, such as heart disease
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Patients seeking treatment for weight loss should consult a physician trained in management of overweight or obesity. Samantha Agate, Fort Worth Star-Telegram, 2 June 2026 It’s expected that the temporary coverage of obesity medications, which sidesteps federal law, will unleash millions of new patients and billions of dollars in revenue for the drugs’ manufacturers, Eli Lilly and Novo Nordisk. Allison Deangelis, STAT, 1 June 2026 Patients seeking treatment for weight loss should consult a physician trained in management of overweight or obesity. Samantha Agate, Kansas City Star, 1 June 2026 The drug maker Eli Lilly announced last week that both of its obesity medicines will soon be on the formularies of all three of the nation’s largest pharmacy benefit managers, OptumRx, Express Scripts and CVS Caremark. Joshua P. Cohen, Forbes.com, 1 June 2026 See All Example Sentences for obesity

Word History

Etymology

borrowed from Middle French & Latin; Middle French obesité, borrowed from Latin obēsitāt-, obēsitās, from obēsus "fat, stout" + -itāt-, -itās -ity — more at obese

First Known Use

circa 1611, in the meaning defined above

Time Traveler
The first known use of obesity was circa 1611

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Cite this Entry

“Obesity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/obesity. Accessed 4 Jun. 2026.

Medical Definition

obesity

noun
obe·​si·​ty ō-ˈbē-sət-ē How to pronounce obesity (audio)
plural obesities
: a condition that is characterized by excessive accumulation and storage of fat in the body and that in an adult is typically indicated by a body mass index of 30 or greater

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