<p><strong>Noun</strong></p><ul><li>A person or thing that removes or puts a head on something.</li><li>A reaping machine that cuts off and gathers only the heads of the grain.</li><li>A chamber to which the ends of a number of tubes are connected so that water or steam may pass freely from one tube to the other.</li><li>Automotive. An exhaust manifold.</li><li>Building Trades. A brick or stone laid in a wall or the like so that its shorter ends are exposed or parallel to the surface.</li><li>A framing member crossing and supporting the ends of joists, studs, or rafters so as to transfer their weight to parallel joists, studs, or rafters.</li><li>Informal. A plunge or dive headfirst, as into water: He stumbled and took a header into the ditch.</li><li>Soccer. A pass or shot made by heading the ball.</li><li>A sign that is part of or attached to the top of a rack displaying merchandise.</li><li>Computers. A line of information placed at the top of a page for purposes of identification.</li></ul>