body mass index

noun

: a measure of body fat that is the ratio of the weight of the body in kilograms to the square of its height in meters

Examples of body mass index in a Sentence

A person with a body mass index of more than 30 is considered to be obese.
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.
People with a balanced gut microbiome are more likely to have a healthy body mass index (BMI). Carrie Madormo, Verywell Health, 11 June 2026 Researches accounted for some lifestyle factors, like smoking, physical activity, and alcohol consumption, but not for others like total dietary intake, body mass index, or income, which could also impact results. Tom Gavin, EverydayHealth.com, 10 June 2026 Meal timing and the gut In the new research, the authors defined chronic physiological stress by participants’ composite allostatic load score — which involves eight cardiovascular, metabolic and inflammatory biomarkers, such as blood pressure, cholesterol and body mass index. Kristen Rogers, CNN Money, 8 June 2026 The groups were matched across age, race, ethnicity, body mass index, breast density and diabetes status. Ken Alltucker, USA Today, 2 June 2026 See All Example Sentences for body mass index

Word History

First Known Use

1983, in the meaning defined above

Time Traveler
The first known use of body mass index was in 1983

Browse Nearby Words

Cite this Entry

“Body mass index.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/body%20mass%20index. Accessed 15 Jun. 2026.

Kids Definition

body mass index

noun
: a measure of body fat that is the ratio of the weight of the body in kilograms to the square of its height in meters

Medical Definition

body mass index

noun
: a measure of body fat that is the ratio of the weight of the body in kilograms to the square of its height in meters
a body mass index in adults of 25 to 29.9 is considered an indication of overweight, and 30 or more an indication of obesity
abbreviation BMI

called also Quetelet index

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