Transvestism is the practice of cross-dressing, which is wearing the dresses of the opposite sex.

Am I A Tomboy, A Crossdresser, Or A Lesbian If I'm More Comfortable Wearing Guys' Wardrobe?
Although the term dressing in womens clothing was a modern invention, it has exactly the same two Latin beginnings as the .....
Although the term dressing in womens clothing was a modern invention, it has exactly the same two Latin origins as the word travesty, which dates from the 17th century.
The gay and lesbian rights movement after the Stonewall riots weakened tranvestism's integration with homosexuality, since more lesbians and gays became visible and most of them did not show transvestite behaviour. They (usually) exclude transvestic fetishism and they usually do not include transsexualism, or transgender people who completely change their gender role. What hurt me the most was that people assumed I was a lesbian, a cross-dresser.
However, some researchers never stopped using the term crossdressing for female-bodied persons, and recently some groups of female-bodied transvestites have started to use the term to describe themselves, although the term "drag king" is more predominant.