as in lightweight
having little weight
the long illness left him frail and underweight
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Recent Examples of underweight
The young male California sea lion seemed underweight at around 60 to 70 pounds, and its flippers were tucked tightly into his abdomen, said Giancarlo Rulli, a spokesperson for the Marine Mammal Center.
—
Krissy Waite, Mercury News, 23 July 2025
On Tuesday, Oppenheimer upgraded the stock to an outperform rating from perform, while JPMorgan upgraded shares to neutral from underweight.
—Lisa Kailai Han, CNBC, 29 July 2025
Body Mass Index — or BMI — is a formula where a person's weight (in kilograms) is divided by the square of their height (in meters), and that number is used to sort people into four categories: underweight, healthy, overweight or obese.
—Vanessa Etienne, People.com, 14 July 2025
Not appropriate for all individuals: People who are pregnant, underweight, malnourished, or have a history of disordered eating should avoid the AIP diet.
—Verywell Health, 22 June 2025
See All Example Sentences for underweight
Krissy Waite, Mercury News, 23 July 2025
On Tuesday, Oppenheimer upgraded the stock to an outperform rating from perform, while JPMorgan upgraded shares to neutral from underweight.
—Lisa Kailai Han, CNBC, 29 July 2025
Body Mass Index — or BMI — is a formula where a person's weight (in kilograms) is divided by the square of their height (in meters), and that number is used to sort people into four categories: underweight, healthy, overweight or obese.
—Vanessa Etienne, People.com, 14 July 2025
Not appropriate for all individuals: People who are pregnant, underweight, malnourished, or have a history of disordered eating should avoid the AIP diet.
—Verywell Health, 22 June 2025
See All Example Sentences for underweight
Recent Examples of Synonyms for underweight
lightweight
Adjective
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Dress appropriately: Wear lightweight, loose-fitting clothing to stay comfortable.—
CA Weather Bot,
Sacbee.com,
13 Aug. 2025
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This flip straw-bottle-style Stanley is a favorite among Gen-Z for its lightweight design, which can be easily toted along during a long school day or sporting events.—
Jené Luciani Sena
may earn a commission if you buy through our referral links. This content was created by a team that works independently from the Fox newsroom.,
FOXNews.com,
13 Aug. 2025
Cite this Entry
“Underweight.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underweight. Accessed 19 Aug. 2025.
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