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.

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

plural of header

(computing) Provided with a header.

present participle of header

(soccer) A ball struck near ground level by the head of a diving player.

(programming) A file, usually in the form of source code, that is automatically included in another source file by the compiler. / (programming) A file that contains declarations but no implementations.

(sports) A pair of games played one after another between the same teams. / A pair of sporting events, one after the other, at a single venue.

plural of double-header

plural of header file