A “mistress” in femdom (female dominance) is a woman who takes on a dominant role in a BDSM relationship. She may be involved in various forms of power play, such as bondage, discipline, and sadomasochism, and may also be referred to as a “dominatrix.” The term “mistress” is also often used more generally to refer to any woman who is in a position of power or control over a submissive partner.