verb un·der·dress \ˌən-dər-ˈdres\

: to dress in clothes that are too informal or not warm enough for an occasion

Full Definition of UNDERDRESS

intransitive verb
:  to dress in overly or inappropriately simple or informal clothing
transitive verb
:  to dress (as oneself) more simply or informally than is appropriate

Examples of UNDERDRESS

  1. I don't want to underdress for the party.

First Known Use of UNDERDRESS

circa 1784


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