as in lightweight
having little weight
the long illness left him frail and underweight
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Recent Examples of underweight
At least 20 babies have died within 24 hours of birth, UNFPA said, while 33% were born prematurely, underweight or required admission to neonatal intensive care.
—
Astha Rajvanshi, NBC news, 25 July 2025
For example, reward systems often overweight drive and underweight temperance, with a focus on results at any cost.
—Mary Crossan, Forbes.com, 23 July 2025
People are considered underweight if their BMI is lower than 18.5.
—Sandee Lamotte, CNN Money, 24 June 2025
The cat was discovered when the container was opened in Oakdale, Minnesota, extremely dehydrated and dangerously underweight, but miraculously alive!
See how this courageous cat survived trip from China to Minnesota below.
—Kendall Malinchock, USA Today, 24 June 2025
See All Example Sentences for underweight
Astha Rajvanshi, NBC news, 25 July 2025
For example, reward systems often overweight drive and underweight temperance, with a focus on results at any cost.
—Mary Crossan, Forbes.com, 23 July 2025
People are considered underweight if their BMI is lower than 18.5.
—Sandee Lamotte, CNN Money, 24 June 2025
The cat was discovered when the container was opened in Oakdale, Minnesota, extremely dehydrated and dangerously underweight, but miraculously alive!
See how this courageous cat survived trip from China to Minnesota below.
—Kendall Malinchock, USA Today, 24 June 2025
See All Example Sentences for underweight
Recent Examples of Synonyms for underweight
lightweight
Adjective
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Here, the brand blends 2% of the ingredient into a lightweight serum that can be applied seamlessly to the scalp via a dropper.—
Kiana Murden,
Vogue,
12 Sep. 2025
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The lightweight formula glides on with a refreshing tingle, then rinses away to reveal skin that feels softer, smoother, and more luminous.—
Christa Joanna Lee,
Allure,
12 Sep. 2025
Cite this Entry
“Underweight.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underweight. Accessed 16 Sep. 2025.
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