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

Example Sentences

obesity has been linked to a number of health risks, such as heart disease
Recent Examples on the Web The change in diet incited an intergenerational epidemic of obesity and diabetes among Native American communities that many still live with today. The Arizona Republic, 24 Nov. 2022 In an effort dedicated to combatting childhood obesity within a generation, Obama launched the Let’s Move Campaign in 2010. Melissa Noel, Essence, 23 Nov. 2022 The Buckeye State's obesity rate was 34.8% in 2022, which is lower than the national average between 2017 and 2020. Victoria Moorwood, The Enquirer, 22 Nov. 2022 The obesity rate is 36 percent and more than 20 percent of adults smoke, according to the data. Amy Yurkanin | Ayurkanin@al.com, al, 21 Nov. 2022 Analysts forecast obesity medication is the next blockbuster pharmaceutical category, equivalent to the revolution in treating high blood pressure in the 1980s, The Financial Times tells us. Ed Silverman, STAT, 21 Nov. 2022 Across the Gulf, public health advocates want to use sports to encourage physical activity among populations that struggle with childhood obesity and diabetes. Vivian Nereim, New York Times, 19 Nov. 2022 Many factors can affect your balance outside of age, such as medication, vision changes, neuropathy of the feet, brain injuries, obesity and a general lack of physical fitness. Melanie Radzicki Mcmanus, CNN, 18 Nov. 2022 There are other reasons someone could wind up losing length down there beyond obesity, though. Cassie Shortsleeve, Men's Health, 18 Nov. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'obesity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


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

Dictionary Entries Near obesity

Cite this Entry

“Obesity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/obesity. Accessed 2 Dec. 2022.

Medical Definition



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

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