: weighing less than the normal or requisite amount
Synonyms
Examples of underweight in a Sentence
Adjective
the long illness left him frail and underweight
Recent Examples on the Web
David Faris, Newsweek, 19 Jan. 2025
Wells is sticking by its underweight rating on Tesla , a minority view among Wall Street analysts after the stock has soared in the wake of President-elect Donald Trump’s promises to deregulate industry and his close ties to Tesla CEO Elon Musk.
—Spencer Kimball, CNBC, 15 Jan. 2025
As a screening measure, BMI is a quick, cheap, and reliable measure of categorizing someone as underweight (less than 18.5 kg/m2), a healthy weight (18.5 to less than 25), overweight (25 to less than 30), or obese (30 or greater).
—New Atlas, 14 Jan. 2025
Korean stocks were raised to neutral from underweight.
—Chloe Berger, Fortune Asia, 9 Jan. 2025
See all Example Sentences for underweight 
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Adjective
Calculated by dividing a person's weight by their height, the result then classifies individuals into categories: underweight, normal weight, overweight, or obese.
—David Faris, Newsweek, 19 Jan. 2025
Wells is sticking by its underweight rating on Tesla , a minority view among Wall Street analysts after the stock has soared in the wake of President-elect Donald Trump’s promises to deregulate industry and his close ties to Tesla CEO Elon Musk.
—Spencer Kimball, CNBC, 15 Jan. 2025
As a screening measure, BMI is a quick, cheap, and reliable measure of categorizing someone as underweight (less than 18.5 kg/m2), a healthy weight (18.5 to less than 25), overweight (25 to less than 30), or obese (30 or greater).
—New Atlas, 14 Jan. 2025
Korean stocks were raised to neutral from underweight.
—Chloe Berger, Fortune Asia, 9 Jan. 2025
See all Example Sentences for underweight
Dictionary Entries Near underweight
Cite this Entry
“Underweight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underweight. Accessed 23 Jan. 2025.
Copy CitationMedical Definition
underweight
adjective
un·der·weight
-ˈwāt 
: weighing less than the normal amount for one's age, height, and build
underweight children
underweight adults typically have a body mass index of less than 18.5
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