header

n. head-first dive; butt, ramming; top title, title which appears at the top of every page of a document (Computers); text which appears at the top of a document or letter on the Internet and indicates its origin and destination (Computers)

Header may refer to:Header (film), the movie adapted from the Splatterspunk author Edward Lee's cult classic novella 'Header'Header (information technology), supplemental data at the beginning of a data blockHeader file, a text file used in computer programming (especially in C or C++)Page header, in printing or typography the material separated from the main body and appears at the top of a pageAn exhaust manifold in automotive engineeringA lintel in building constructionAn electronic component which supplies a physical interface (usually a  connector of some type) to a group of signal lines or PCB traces.Use of the player's head to direct the ball in association football (soccer)A competitor in the team roping rodeo event who specializes in roping a steer's headA herding dog with a specific method of interacting with its flockTake a header, to fall headlong or upon one's head, especially from a penny-farthing bicycle
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Noun
1. 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"
(synonym) heading, head
(hypernym) line
(hyponym) crossheading, crosshead
(derivation) head
2. horizontal beam used as a finishing piece over a door or window
(synonym) lintel
(hypernym) beam
3. brick that is laid sideways at the top of a wall
(synonym) coping, cope
(hypernym) brick
(part-holonym) wall
4. 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
(hypernym) beam
5. a machine that cuts the heads off grain and moves them into a wagon
(hypernym) harvester, reaper
6. (soccer) the act of hitting the ball with your head
(hypernym) hit, hitting, striking
(classification) soccer, association football
7. a headlong jump (or fall); "he took a header into the shrubbery"
(hypernym) jump, jumping

(n.)
One who, or that which, heads nails, rivets, etc., esp. a machine for heading.
  

(n.)
One who heads a movement, a party, or a mob; head; chief; leader.
  

(n.)
In framing, the piece of timber fitted between two trimmers, and supported by them, and carrying the ends of the tailpieces.
  

(n.)
A reaper for wheat, that cuts off the heads only.
  

(n.)
A fall or plunge headforemost, as while riding a bicycle, or in bathing; as, to take a header.
  

(n.)
A brick or stone laid with its shorter face or head in the surface of the wall.
  

The portion of a message that contains information used to guide the message to the correct destination. (188 ) Note: Examples of items that may be in a header are the addresses of the sender and receiver, precedence level, routing instructions, and synchronizing bits.