Definition of "header"
- noun
- The upper portion of a page (or other) layout. 
- Text, or other visual information, used to mark off a quantity of text, often titling or summarizing it. 
- Text, or other visual information, that goes at the top of a column of information in a table. 
- A font, text style, or typesetting used for any of the above. 
- A brick that is laid sideways at the top of a wall or within the brickwork with the short side showing; compare stretcher. 
- A horizontal structural or finish piece over an opening. 
- A machine that cuts the heads off of grain etc. 
- The act of hitting the ball with the head. 
- A headlong fall or jump. 
- The first part of a file or record that describes its contents. 
- The first part of a packet, often containing its address and descriptors. 
- A raised tank that supplies water at constant pressure, especially to a central heating and hot water system. 
- Sources