engine that converts mechanical energy into electrical energy by electromagnetic induction | motor that converts thermal energy to mechanical work |
an apparatus that produces a vapor or gas | a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks |
an electronic device for producing a signal voltage | an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc. |
someone who originates or causes or initiates something | something used to achieve a purpose |