Underdress definition
Apparel worn beneath outer garments; underclothing.
noun
An outer garment, such as a dress beneath a tunic or coat, that is worn as part of a costume or suit.
noun
To dress too informally for an occasion.
Remember not to underdress for the wedding.
verb
To dress (oneself, for example) too informally for an occasion.
You don't want to be underdressed at the awards ceremony.
verb
To dress more plainly or informally than is indicated by the occasion.
verb
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Origin of underdress
- From under- +"Ž dress.
From Wiktionary