obesity

noun

obe·​si·​ty ō-ˈbē-sə-tē How to pronounce obesity (audio)
: 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.
Conditions listed includes some common health issues such as diabetes, a history of smoking and obesity. Anna Kleiber, jsonline.com, 19 Sep. 2025 But might funding be tied in some way to kids’ health outcomes, maybe even reductions in childhood obesity? Teri Sforza, Oc Register, 19 Sep. 2025 Finally, shares rose briefly Wednesday after its obesity pill outperformed competitor Novo Nordisk's oral drug in a head-to-head diabetes trial. Morgan Chittum, CNBC, 18 Sep. 2025 In research released by Novo Nordisk—developer of the injectable version of the diabetes drug Ozempic—205 participants with obesity took the oral semaglutide pill for 64 weeks alongside 102 participants taking a non-active placebo pill. Hannah Millington, MSNBC Newsweek, 17 Sep. 2025 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

Browse Nearby Words

Cite this Entry

“Obesity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/obesity. Accessed 21 Sep. 2025.

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

More from Merriam-Webster on obesity

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!