tooltool /tul/ noun 
► tool
► tool something that you hold in your hand and use for doing a particular job: The tool set includes a hammer, screwdriver, drill, and wrenches. Painting tools such as brushes and rollers are kept in the garage.
► instrument a piece of scientific equipment or a medical tool: Microscopes are useful scientific instruments. The dentist's instruments were spread out on a tray.
► gadget a small tool or machine, especially one that is new or interesting. People sometimes use gadget when they think that something is useful but not really necessary: This handy kitchen gadget grates cheese or slices onions in no time.
► device AWL a machine or small tool that is used to do a particular thing: A corkscrew is a device for opening wine bottles.
► utensil something that you use for preparing and eating food: Knives, pots, and other kitchen utensils lay on the counter.
► implement AWL (formal) a tool, especially one used for outdoor work: The barn contained old farm implements, such as plows that could be pulled by horses.
➔ see equipment