Webster 1913 Edition



One who, or that which, heads nails, rivets, etc., esp. a machine for heading.
One who heads a movement, a party, or a mob; head; chief; leader.
A brick or stone laid with its shorter face or head in the surface of the wall.
In framing, the piece of timber fitted between two trimmers, and supported by them, and carrying the ends of the tailpieces.
A reaper for wheat, that cuts off the heads only.

Webster 1828 Edition



hed'er. One who heads nails or pins.
One who leads a mob or party.
The first brick in the angle of a wall.

Definition 2024





header (plural headers)

  1. The upper portion of a page (or other) layout.
    If you reduce the header of this document, the body will fit onto a single page.
  2. Text, or other visual information, used to mark off a quantity of text, often titling or summarizing it.
    Your header is too long; "Local Cannibals" will suffice.
  3. Text, or other visual information, that goes at the top of a column of information in a table.
    That column should have the header "payment status".
  4. (informal) A font, text style, or typesetting used for any of the above.
    Parts of speech belong in a level-three header. Level-two headers are reserved for the name of the language.
  5. a brick that is laid sideways at the top of a wall or within the brickwork with the short side showing; compare stretcher
    This wall has four header courses.
  6. a horizontal structural or finish piece over an opening
  7. a machine that cuts the heads off of grain etc
    They fed the bale into the header.
  8. (soccer) the act of hitting the ball with the head
    His header for the goal followed a perfect corner kick.
    • 2011 October 1, Phil Dawkes, “Sunderland 2 - 2 West Brom”, in BBC Sport:
      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.
  9. a headlong fall or jump
    The clown tripped over the other clown and took a header.
  10. (computing) the first part of a file or record that describes its contents
    The header includes an index, an identifier, and a pointer to the next entry.
  11. (programming) Short for header file.
  12. (networking) the first part of a packet, often containing its address and descriptors
    The encapsulation layer adds an eight-byte header and a two-byte trailer to each packet.
  13. A raised tank that supplies water at constant pressure, especially to a central heating and hot water system
  14. A pipe which connects several smaller pipes.
    Common practice is to use plastic pipes with iron headers.


  • (text used to mark off a quantity of text): head, heading
  • (brick that is laid sideways): bonder, coping, cope
  • (horizontal structural or finish piece over an opening): lintel



Related terms


header (third-person singular simple present headers, present participle headering, simple past and past participle headered)

  1. (sports, transitive) To strike (a ball) with one's head.