n. The motion of a body along a plane when the same face or surface of the moving body keeps in contact with the surface of the plane: thus distinguished from rolling, in which the several parts of the moving body come successively in contact with the plane on which it roils.n. The sport of gliding on snow or ice, on the feet, on a sled or a toboggan, or (in former use) on skates, etc.n. Falling; lapse; merging.n. Transgression; lapse; backsliding.Slippery; uncertain; unstable; changing.Movable; graduated; varying; changing according to circumstances: as, a sliding scale (which see, under slide, v.).That slides; fitted for being slid.Sloping.