: weighing less than the normal or requisite amount
Synonyms
Examples of underweight in a Sentence
Adjective
the long illness left him frail and underweight
Recent Examples on the Web
Pia Singh,fred Imbert, CNBC, 3 Sep. 2024
People are considered underweight if their BMI is lower than 18.5.
—Sandee Lamotte, CNN, 2 Aug. 2024
Long said the underweight thesis just didn’t materialize and the trading multiple has moved closer to historical trends.
—Alex Harring,fred Imbert, CNBC, 13 Aug. 2024
Yacht Rescues Stranded Dog Found Paddling in Florida Bay Over a Mile from Shore
Physically, the dog was underweight and had swollen legs, lumps under his neck, and ear infections.
—Kelli Bender, Peoplemag, 1 Aug. 2024
See all Example Sentences for underweight 
Adjective
Analyst Matthew Akers downgraded shares to underweight from equal weight and cut his price target by $66 to $119.
—Pia Singh,fred Imbert, CNBC, 3 Sep. 2024
People are considered underweight if their BMI is lower than 18.5.
—Sandee Lamotte, CNN, 2 Aug. 2024
Long said the underweight thesis just didn’t materialize and the trading multiple has moved closer to historical trends.
—Alex Harring,fred Imbert, CNBC, 13 Aug. 2024
Yacht Rescues Stranded Dog Found Paddling in Florida Bay Over a Mile from Shore
Physically, the dog was underweight and had swollen legs, lumps under his neck, and ear infections.
—Kelli Bender, Peoplemag, 1 Aug. 2024
See all Example Sentences for underweight
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'underweight.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near underweight
Cite this Entry
“Underweight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underweight. Accessed 18 Sep. 2024.
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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share