What does obese mean?
Obese is an adjective describing someone or something characterized by an excessive amount of body fat. It is used most often in medicine, public health, and formal discussion, where it identifies a condition associated with increased risks of illnesses such as diabetes, cardiovascular disease, and certain joint problems. In ordinary conversation, overweight may be a gentler and less precise term, while fat can be neutral in some contexts but may be perceived as rude. The word has a clinical tone and should be used sensitively, especially when speaking with or about an individual. Obesity is generally defined through measures such as body mass index, although clinicians may also consider body composition and other health factors. The term comes from Latin through French and ultimately reflects an older idea of being well-fed or plump, but its modern meaning is specifically medical rather than simply descriptive.
adjectiveDescribing a person or condition characterized by an excessive amount of body fat, generally recognized as a medical condition rather than merely being overweight. The term is especially common in clinical, public-health, and formal contexts.
- Characterized by an excessive amount of body fat, especially in a medical or public-health context.
"The clinic provides specialist support for children who are obese or at high risk of developing obesity."
"Public-health programs aim to reduce the number of obese adults in the population."
"The doctor discussed long-term treatment options with her obese patient."
The word derives from a Latin past participle meaning “well-fed,” a historical reminder that language can carry kinder meanings than the difficult health condition it now describes.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does obese come from?
English obese comes through French obèse from Latin obesus, meaning “fat” or “plump.” Latin obesus is generally analyzed as a form related to ob- and edere, “to eat,” so its earlier sense conveyed being well-fed or having been fed abundantly. English later adopted the word in medical usage, where it came to describe excessive body fat as a health condition.
Related word forms
How obese is actually used
In contemporary usage, obese is usually a clinical and relatively formal term. It can sound harsh or stigmatizing when directed at an individual, so health professionals often prefer person-first wording such as “a person with obesity.”
Easily confused with obese
Overweight describes having more body weight than is considered healthy, while obese specifically refers to a higher and generally more medically significant level of excess body fat.
Fat can be a neutral general description, whereas obese is a more formal and clinically specific term and may be considered insensitive when used casually.