The dominant controls the BDSM scene or relationship, exercising authority over the submissive partner(s)
In BDSM, a top or dominant is the partner in a BDSM relationship or in a BDSM scene who takes the active or controlling role over that of the bottom or submissive partner(s).
A person who submits control of a large percentage of his or her day-to-day life to a dominant partner, or who submits within a formal set of rules and rituals, is the slave, and the person who assumes power over the slave is the master or mistress.
Terminology
Agreement on the exact meanings of the following terms is far from universal. For example, the function of tops and dominants is similar, and, in many cases, overlaps, but while the terms are used interchangeably in some discussions, there are differences between the two.
The top is the actor within the BDSM context who applies to the bottom partner(s) the techniques of a sexual, sensual, and psychological activity: flogging, bondage, servitude, or humiliation. (more…)