Header

n.	1.	One who, or that which, heads nails, rivets, etc., esp. a machine for heading.
	2.	One who heads a movement, a party, or a mob; head; chief; leader.
	3.	(Arch.) A brick or stone laid with its shorter face or head in the surface of the wall.
	4.	A reaper for wheat, that cuts off the heads only.
	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.

Noun	1.	header - a line of text serving to indicate what the passage below it is about; "the heading seemed to have little to do with the text" Synonyms: heading, head
	2.	header - horizontal beam used as a finishing piece over a door or window Synonyms: lintel
	3.	header - brick that is laid sideways at the top of a wall Synonyms: cope, coping
	4.	header - 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
	5.	header - a machine that cuts the heads off grain and moves them into a wagon
	6.	header - (soccer) the act of hitting the ball with your head
	7.	header - a headlong jump (or fall); "he took a header into the shrubbery"

1.		header - The portion of a packet, preceding the actual data, containing source and destination addresses, error checking and other fields.
2.		header - The part of an electronic mail message or news article that precedes the body of a message and contains, among other things, the sender's name and e-mail address and the date and time the message was sent.

belly buster, belly flop, belly whopper, cannonball, crash dive, cropper, culbute, dive, drop, fall, flop, forced landing, gainer, jackknife, nose dive, parachute jump, pitch, plunge, pounce, power dive, pratfall, running dive, sky dive, spill, sprawl, stationary dive, stoop, stumble, swan dive, swoop, trip, tumble