transvestism
noun
trans·ves·tism
| \ tran(t)s-ˈves-ˌtiz-əm, tranz-
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variants:
also transvestitism \ -ˈves-ˌtit-ˌiz-əm
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Medical Definition of transvestism
: the practice of adopting the dress, the manner, and sometimes the sexual role of the opposite sex