noun a reaper for wheat, that cuts off the heads only.
2. header ·noun one who heads a movement, a party, or a mob; head; chief; leader.
3. header ·noun one who, or that which, heads nails, rivets, ·etc., ·esp. a machine for heading.
4. header ·noun a brick or stone laid with its shorter face or head in the surface of the wall.
5. header ·noun a fall or plunge headforemost, as while riding a bicycle, or in bathing; as, to take a header.
6. header ·noun in framing, the piece of timber fitted between two trimmers, and supported by them, and carrying the ends of the tailpieces.