header

1. (informal) A font, text style, or typesetting used for any of the above.Examples: "Parts of speech belong in a level-three header. Level-two headers are reserved for the name of the language."informal

2. (computing) The first part of a file or record that describes its contents.Examples: "The header includes an index, an identifier, and a pointer to the next entry."

3. (programming) Clipping of header file.abbreviationalt-ofclipping

4. (networking) the first part of a packet or stream, often containing its address and descriptors.Examples: "The encapsulation layer adds an eight-byte header and a two-byte trailer to each packet."

5. (masonry) A brick that is laid sideways (on its largest face), for example at the top of a wall or within the brickwork, with its smallest side showing (oriented so that that side is wider than it is tall).Examples: "This wall has four header courses."Synonyms: bonder, coping, cope

6. (soccer) The act of hitting the ball with the head.Examples: "His header for the goal followed a perfect corner kick."; "The Black Cats had a mountain to climb after James Morrison's header and Shane Long's neat side-foot finish gave Albion a 2-0 lead five minutes in."