Tool  —n. 1 implement used to carry out mechanical functions by hand or by machine. 2 thing used in an occupation or pursuit (tools of one's trade). 3 person merely used by another. 4 coarse slang penis. —v. 1 dress (stone) with a chisel. 2 impress a design on (leather). 3 (foll. By along, around, etc.) Slang drive or ride, esp. In a casual or leisurely manner. [old english]