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.
In later life, this formative programming can increase the risk of not only mental illnesses like depression, but physical diseases too, such as cancer and obesity. Literary Hub, 20 May 2026 Chronic short sleep raises blood pressure, impairs glucose metabolism and is linked to higher rates of obesity, type 2 diabetes, cardiovascular disease, depression and anxiety. Allison Palmer, Sacbee.com, 19 May 2026 Speaking to The Daily Campus, Southern Methodist University's newspaper, in 2011, Basso said the restaurant was intended as a commentary on America's obesity epidemic. Andrea Margolis, FOXNews.com, 19 May 2026 The Nature study found short sleep specifically associated with depression, anxiety, obesity, type 2 diabetes, high blood pressure and heart disease. Allison Palmer, Charlotte Observer, 19 May 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 21 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