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.
Eating avocado can also be beneficial for people living with obesity or insulin resistance, as studies show that regular avocado consumption can improve blood glucose control and reduce the risk of cardiometabolic disease. Angelica Bottaro, Verywell Health, 28 Apr. 2026 But along with its legitimate use for obesity and diabetes comes the potential for abuse. Rory Satran, Vogue, 28 Apr. 2026 The study, published in the journal Alzheimer’s and Dementia by the Alzheimer’s Association, revealed that UPFs are linked to more than 30 adverse health outcomes, including several dementia risk factors, like cardiovascular disease, type 2 diabetes and obesity. Angelica Stabile, FOXNews.com, 28 Apr. 2026 Some colon cancer cases are caused by genetics, but many are caused in part by other factors like diet, exercise and obesity. Eva Flowe april 27, Charlotte Observer, 27 Apr. 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

Browse Nearby Words

Cite this Entry

“Obesity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/obesity. Accessed 1 May. 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

More from Merriam-Webster on obesity

Love words? Need even more definitions?

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

More from Merriam-Webster