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.
It was made by a senior clinician at the National Institutes of Health named Ranganath Muniyappa, who requested it on behalf of a patient with refractory obesity, obstructive sleep apnea, and pulmonary hypertension, which is high blood pressure in the lungs. Beth Mole, ArsTechnica, 23 June 2026 Wegovy and Ozempic transformed the business; obesity-care sales rose 56% in 2024 and investors began treating Novo as one of the market’s great long-term compounders. Jim Osman, Forbes.com, 21 June 2026 In a separate 16-week trial, liraglutide improved hormones in obese men with functional hypogonadism, meaning low testosterone was likely related to obesity. Angelica Stabile, FOXNews.com, 20 June 2026 Despite the setbacks, Jyske Bank analyst Henrik Hallengreen Laustsen sees a future for survodutide as a treatment for fatty liver disease, and for petrelintide for obesity. Elsa Ohlen, CNBC, 19 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 24 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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