Synonyms of underweight

underweight

adjective

as in lightweight

having little weight

the long illness left him frail and underweight

Synonyms & Similar Words

• lightweight
• fragile
• thin
• small
• weightless
• light
• feathery
• undersized
• tiny
• undersize
• puny
• diminutive
• featherlight
• smallish
• petite
• slender
• slim
• wee
• little
• flimsy
• insubstantial
• bantam
• minute
• slight

Antonyms & Near Antonyms

• overweight
• heavy
• large
• leaden
• weighty
• ponderous
• hefty
• considerable
• extensive
• substantial
• handsome
• huge
• great
• big
• oversized
• massive
• super
• sizeable
• voluminous
• sizable
• oversize
• goodly
• jumbo
• bulky
• cumbersome
• unwieldy
• largish
• overscaled
• hulking
• king-size
• overscale
• king-sized
• whacking

Example Sentences

Recent Examples of underweight

At the hospital, staff told police the infant weighed about 13 pounds and was extremely underweight and underdeveloped for her age, according to Brittian’s arrest affidavit. —Silas Morgan, Orlando Sentinel, 18 Mar. 2025

Wells Fargo lowered its price target on Ulta Beauty to $310 a share from $360 and kept its underweight sell rating on the stock after earnings. —Jim Cramer, CNBC, 14 Mar. 2025

Body Mass Index — or BMI — is a formula where a person's weight (in kilograms) is divided by the square of their height (in meters), and that number is used to sort people into four categories: underweight, healthy, overweight or obese. —Vanessa Etienne, People.com, 28 Feb. 2025

He was taken to Mystic Aquarium to rehab after an exam showed the seal was underweight and dehydrated. —David Matthews, New York Daily News, 4 Mar. 2025