Definitions
1.VerbTo rub, especially to rub onto one surface placed upon another surface that is textured, in order to create a mottled or patterned area on the first surface.
2.VerbTo rub parts of the body against those of another person for sexual stimulation.
3.NounA method of making an image by placing a piece of paper against an object and then rubbing over it, usually with a pencil or charcoal.
4.NounAn illustration made by means of frottage.
5.NounThe practice of rubbing parts of the body against those of another person for sexual stimulation.