as in lightweight
having little weight
the long illness left him frail and underweight
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Recent Examples of underweight
Consider These Questions Moreau cautions that short-term fasting is not for everyone, and people with medical conditions, or those who are underweight or prone to disordered eating should consult a clinician before making dietary changes.
—
Tom Gavin, EverydayHealth.com, 11 Nov. 2025
Strays may appear underweight, often roam alone, and tend to hang around homes.
—Maria Azzurra Volpe, MSNBC Newsweek, 10 Nov. 2025
Normally, that would point to Type 1 diabetes, where individuals are unable to make their own insulin and can become underweight.
—Jonathan Lambert, NPR, 29 Sep. 2025
Obesity can disrupt the body's metabolism, weaken the immune system and lead to diseases like Type 2 diabetes, cardiovascular diseases and up to 15 different cancers, while being underweight is tied to malnutrition, weakened immunity and nutrient deficiencies, Gribsholt warned.
—Deirdre Bardolf, FOXNews.com, 20 Sep. 2025
See All Example Sentences for underweight
Tom Gavin, EverydayHealth.com, 11 Nov. 2025
Strays may appear underweight, often roam alone, and tend to hang around homes.
—Maria Azzurra Volpe, MSNBC Newsweek, 10 Nov. 2025
Normally, that would point to Type 1 diabetes, where individuals are unable to make their own insulin and can become underweight.
—Jonathan Lambert, NPR, 29 Sep. 2025
Obesity can disrupt the body's metabolism, weaken the immune system and lead to diseases like Type 2 diabetes, cardiovascular diseases and up to 15 different cancers, while being underweight is tied to malnutrition, weakened immunity and nutrient deficiencies, Gribsholt warned.
—Deirdre Bardolf, FOXNews.com, 20 Sep. 2025
See All Example Sentences for underweight
Recent Examples of Synonyms for underweight
lightweight
Adjective
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This eye cream has a lightweight feel that absorbs into your skin without a greasy finish.—
Caley Sturgill,
Southern Living,
5 Feb. 2026
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That balance—enhancing performance while preserving appearance—supports applications that need lightweight fabrics as well as sectors with more technical needs.—
Alexandra Harrell,
Sourcing Journal,
5 Feb. 2026
Cite this Entry
“Underweight.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underweight. Accessed 15 Feb. 2026.
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