as in lightweight
having little weight
the long illness left him frail and underweight
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Recent Examples of underweight
Contrary to popular assumptions, children experiencing food insecurity do not necessarily appear underweight.
—
Oona Hanson, CNN Money, 16 Sep. 2025
Being obese is more prevalent than being underweight in all regions of the world except sub-Saharan Africa and South Asia.
—Tom Chivers, semafor.com, 10 Sep. 2025
Per the National Institutes of Health's standards, this is considered underweight.
—EW.com, 21 Aug. 2025
One area investors are underweight on is clean technology.
—Lee Ying Shan, CNBC, 13 Aug. 2025
See All Example Sentences for underweight
Oona Hanson, CNN Money, 16 Sep. 2025
Being obese is more prevalent than being underweight in all regions of the world except sub-Saharan Africa and South Asia.
—Tom Chivers, semafor.com, 10 Sep. 2025
Per the National Institutes of Health's standards, this is considered underweight.
—EW.com, 21 Aug. 2025
One area investors are underweight on is clean technology.
—Lee Ying Shan, CNBC, 13 Aug. 2025
See All Example Sentences for underweight
Recent Examples of Synonyms for underweight
lightweight
Adjective
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The comfortable basic is made with 100 percent cotton that’s lightweight and easy to wear with jeans, shorts, and skirts.—
Nicol Natale,
PEOPLE,
25 Oct. 2025
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Yeti’s Yonder Bottle with a tether cap is lightweight, leakproof, and BPA-free.—
Kristin Braswell,
Travel + Leisure,
25 Oct. 2025
Cite this Entry
“Underweight.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underweight. Accessed 27 Oct. 2025.
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