header

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.

1. a brick or stone laid in a wall or the like so that its shorter ends are exposed or parallel to the surface.

2. 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.

Also called: header tank.  a reservoir, tank, or hopper that maintains a gravity feed or a static fluid pressure in an apparatus

a manifold for distributing a fluid supply amongst a number of passages

a machine that trims the heads from castings, forgings, etc, or one that forms heads, as in wire, to make nails

a person who operates such a machine

a brick or stone laid across a wall so that its end is flush with the outer surface Compare stretcher

the action of striking a ball with the head

informal a headlong fall or dive

computing

1. a block of data on a tape or disk providing information about the size, location, etc, of a file

2. ( as modifier )

   header card

   header label

dialect a mentally unbalanced person