General Definition: 1. Any opening device with two side hinged panels in a wall or fence, such as windows, cupboards, doors, and gates, but especially cupboards and gates. As a Noun: 1. A piece of furniture which has one or two doors at the front and usually shelves inside it. It is used for keeping things in. English = cupboard. 2. A structure like a door that is used at the entrance to a field, a garden, or the grounds of a building. English = gate.