: 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
Greta Cross, USA Today, 10 June 2025
Here’s what some at major shops on Wall Street had to say: Barclays keeps underweight rating and price target of $173 Analyst Tim Long’s target implies about 14% downside from Monday’s close.
—Lisa Kailai Han, CNBC, 10 June 2025
Stray cats tend to be underweight, unfamiliar with their surroundings, and may approach humans hesitantly.
—Maria Azzurra Volpe, MSNBC Newsweek, 4 June 2025
Stella’s Body Condition Score — a tool used to determine if a dog is underweight — was an abysmal 1 out of 9, the vet staff determined.
—Bailey Richards, People.com, 2 June 2025
See All Example Sentences for underweight
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Adjective
When the bear cub arrived to Gold Country Wildlife Rescue in December 2024, he was dehydrated, anemic, severely underweight, suffering from ear infections in both ears and a skin infection, as previously reported by USA TODAY.
—Greta Cross, USA Today, 10 June 2025
Here’s what some at major shops on Wall Street had to say: Barclays keeps underweight rating and price target of $173 Analyst Tim Long’s target implies about 14% downside from Monday’s close.
—Lisa Kailai Han, CNBC, 10 June 2025
Stray cats tend to be underweight, unfamiliar with their surroundings, and may approach humans hesitantly.
—Maria Azzurra Volpe, MSNBC Newsweek, 4 June 2025
Stella’s Body Condition Score — a tool used to determine if a dog is underweight — was an abysmal 1 out of 9, the vet staff determined.
—Bailey Richards, People.com, 2 June 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 16 Jun. 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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