- Apparel worn beneath outer garments; underclothing.
- An outer garment, such as a dress beneath a tunic or coat, that is worn as part of a costume or suit.
verbun·der·dressed, un·der·dress·ing, un·der·dress·es
(third-person singular simple present underdresses, present participle underdressing, simple past and past participle underdressed)
From under- +"Ž dress.