as in lightweight
having little weight
the long illness left him frail and underweight
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Recent Examples of underweight
Paris' vet exam revealed the dog has conjunctivitis, which she is being treated for, and is underweight.
—
Kelli Bender, People.com, 31 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
Kelli Bender, People.com, 31 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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The lightweight, breathable fabric kept us cool even in hot, humid weather, and the stretchy material moved with us all day long.—
Anne Taylor,
Travel + Leisure,
5 Sep. 2025
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If this is your hair type, prioritize lightweight detangling products and sprays—Cavalcante likes Amika and Oribe’s formulas—and work through knots extra gently.—
Grace McCarty,
Glamour,
5 Sep. 2025
Cite this Entry
“Underweight.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underweight. Accessed 9 Sep. 2025.
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