1. being very thin
Sentences with underweight as an adjective:
- He's so underweight he's had to buy smaller clothes.
- He's thirty pounds underweight.
- The suitcase is just slightly underweight; I'll let it on the plane.
- The fund is underweight in mining.
1. The state or quality of being underweight.
1. (transitive) To underestimate the weight of.
2. (transitive) To give insufficient weight to (a consideration); to underestimate the importance of.