(a) Physical descent from a higher to a lower position; a fall, a drop; fal doun; also fig.; (b) fal of water, a waterfall; (c) fal windou, a shutter so hinged at the bottom that it can be dropped. …

(a) A cascade or waterfall, ?a stretch of rapids (b) a steep fall of water from a roof, runoff; ?also, a structure designed to channel rainfall along a roof edge, perh. a downspout [2nd quot.]; (c)……