: weighing less than the normal or requisite amount
Examples of underweight in a Sentence
Adjective
the long illness left him frail and underweight
Recent Examples on the Web
David Matthews, New York Daily News, 4 Mar. 2025
Southwest Airlines — Shares slid 2% after JPMorgan downgraded the airline carrier to an underweight rating from neutral.
—Sarah Min, CNBC, 3 Mar. 2025
The other sea lion, a 6-month-old pup, was rescued after it was seen in Point Loma, isolated, underweight and lethargic, rescuers said.
—Paloma Chavez, Sacramento Bee, 11 Feb. 2025
Scientists search for answers after a gray whale washes ashore in L.A., bitten and underweight.
—Ryan Fonseca, Los Angeles Times, 6 Feb. 2025
See All Example Sentences for underweight
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Adjective
He was taken to Mystic Aquarium to rehab after an exam showed the seal was underweight and dehydrated.
—David Matthews, New York Daily News, 4 Mar. 2025
Southwest Airlines — Shares slid 2% after JPMorgan downgraded the airline carrier to an underweight rating from neutral.
—Sarah Min, CNBC, 3 Mar. 2025
The other sea lion, a 6-month-old pup, was rescued after it was seen in Point Loma, isolated, underweight and lethargic, rescuers said.
—Paloma Chavez, Sacramento Bee, 11 Feb. 2025
Scientists search for answers after a gray whale washes ashore in L.A., bitten and underweight.
—Ryan Fonseca, Los Angeles Times, 6 Feb. 2025
See All Example Sentences for underweight
Cite this Entry
“Underweight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underweight. Accessed 13 Mar. 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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