What does "trolly" mean?

Trolly: (a) A form of truck which can be tilted, for carrying railroad materials, or the like. [Eng.] (b) A narrow cart that is pushed by hand or drawn by an animal. [Eng.] (c) (Mach.) A truck from which the load is suspended in some kinds of cranes. (d) (Electric Railway) A truck which travels along the fixed conductors, and forms a means of connection between them and a railway car. Trolley line, (a) A trolley(e). (b) The path along which a trolley(e) runs. -- Trolley car, a wheeled car powered by electricity drawn from a trolley, and thus constrained to follow the trolley lines.