to dress more plainly or informally than is indicated by the occasion
verbun·der·dressed, un·der·dress·ing, un·der·dress·es
- To dress oneself too informally for an occasion: Don't underdress for the wedding; blue jeans are not appropriate attire.
- To dress oneself too lightly: When it began to snow, I realized I had underdressed for the hike.
- To dress too informally for an occasion: Seeing the other guests in their evening gowns made me feel I had underdressed myself.
- To dress too lightly: You're underdressing the baby for such a cold day!
- 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.
(third-person singular simple present underdresses, present participle underdressing, simple past and past participle underdressed)
From under- +"Ž dress.