header

Concise Oxford English Dictionary © 2008 Oxford University Press:
header/ˈhedə(r)/

▶noun

• 1 Soccer a shot or pass made with the head.

• 2 informal a headlong fall or dive.

• 3 a brick or stone laid at right angles to the face of a wall. Compare with stretcher (sense 5 of the noun).

• 4 (also header tank) a raised tank of water maintaining pressure in a plumbing system.

• 5 a line or block of text appearing at the top of each page of a book or document.