noun A shot or pass made with the head. A headlong fall or dive. A brick or stone laid at right angles to the face of a wall. A line or block of text appearing at the top of each page of a book or document.
A person who ropes a steer by its head (as opposed to its heels), especially in a team-roping rodeo event. (the steer ran straight and the header made a good catch) A mad or foolish person.