Cross-dressing involves wearing clothing traditionally associated with a different gender. In fetish contexts, this may be done for erotic pleasure or as part of roleplay. Watch sissy cams for related content.
The practice exists separately from gender identity - many cross-dressers are cisgender, engaging for various reasons including erotic excitement or exploring different aspects of self.
In BDSM contexts, cross-dressing may be incorporated as forced feminization, where a dominant directs the submissive to dress in specific ways. This adds power exchange elements.
Related terms include sissification and forced feminization. Watch mistress shows to see feminization scenarios.