Without much flesh; very thin
Stunted or straggly:
(Of a person) heavier than what is generally considered healthy for a given body type and height.
(Informal) Very friendly; intimate:
The definition of gaunt is looking thin, bony or sickly.
Smaller in size than is usual, average, or proper
(Chiefly Southern US) Sickly; ill.
Rounded and plump.
Rich; producing a large income; desirable.
Bony and lean:
Abounding with weeds.
Find another word for underweight. In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for underweight, like: skinny, scrawny, overweight, thick, plump, gaunt, undersized, puny, thin, chubby and fat.