obesity

noun

obe·​si·​ty ō-ˈbē-sə-tē 

: 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

Synonyms

• adiposity
• chubbiness
• corpulence
• corpulency
• embonpoint
• fat
• fatness
• fattiness
• fleshiness
• grossness
• plumpness
• portliness
• pudginess
• pursiness
• rotundity
• weight

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

And Latifah said said her cousin, died from obesity and its effects. —Ken Alltucker, USA Today, 15 May 2025

Frequently Asked Questions What is metabolically healthy obesity? —Sherri Gordon, Health, 15 May 2025

In a clinical trial that pit two blockbuster obesity drugs head-to-head, Lilly’s Zepbound beat Novo Nordisk’s Wegovy. —Alex Knapp, Forbes.com, 14 May 2025

Between 2010 and 2018, half of the participants took GLP-1 receptor agonists (GLP-1 RAs) — injectable medications for obesity and type 2 diabetes — with at least six drug purchases within 12 months. —Melissa Rudy, FOXNews.com, 14 May 2025

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

Phrases Containing obesity

• anti-obesity

Medical Definition

obesity

noun

obe·​si·​ty ō-ˈbē-sət-ē 

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