a person or thing that removes or puts a head on something.

a reaping machine that cuts off and gathers only the heads of the grain.

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.

Automotive . an exhaust manifold.

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. Compare stretcher ( def. 5 ) .

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.

Informal . a plunge or dive headfirst, as into water

He stumbled and took a header into the ditch.

Soccer . a pass or shot made by heading the ball.

a sign that is part of or attached to the top of a rack displaying merchandise.

Computers . a line of information placed at the top of a page for purposes of identification.

noun

dive , nosedive , swoop , pitch , plunge , spill , tumble