n. two events, usually entertainment or sports performances, occurring immediately in succession or within a short time of each other; especially, two sports games played by the same teams on the same day, one right after another. A doubleheader in baseball is often scheduled between teams when a previously shceduled game is postponed, as due to rain or other interfering factors. In such cases, the admission price for the doubleheader remains that of a single game, though two games are played.
Syn. -- twin bill, double feature. [ WordNet 1.5 ]

n. 1. One who, or that which, heads nails, rivets, etc., esp. a machine for heading. [ 1913 Webster ]

2. One who heads a movement, a party, or a mob; head; chief; leader. [ R. ] [ 1913 Webster ]

3. (Arch.) (a) A brick or stone laid with its shorter face or head in the surface of the wall. (b) In framing, the piece of timber fitted between two trimmers, and supported by them, and carrying the ends of the tailpieces. [ 1913 Webster ]

4. A reaper for wheat, that cuts off the heads only. [ 1913 Webster ]

5. A fall or plunge head first, as while riding a bicycle, or a skateboard, or in bathing; -- sometimes, implying the striking of the head on the ground; as, to take a header. [ Colloq. ] [ PJC ]