n. A movable barrier of wood, metal, stone, or other material, consisting sometimes of one piece, but generally of several pieces framed together, commonly placed on hinges, for closing a passage into a building, room, or other inclosure.n. An opening for passage into or out of a building or any apartment of it, or any inclosure; a doorway.n. Hence—3. An exterior or public entrance-way, or the house or apartment to which it leads.n. Avenue; passage; means of approach or access, or of exit: commonly in figurative uses: as, the door of reconciliation; a door of escape.n. Near to; bordering on; very nearly.n. Hence, figuratively, quite gone; no more to be found; lost; irrelevant.n. Figuratively, to ruin one.