Definition of: deadhead

(ded′hed′) noun
1. One who receives gratis any service or accommodation for which the general public is expected to pay.
2. A wooden buoy.
3. A sunken or partly sunken log.
—v.t. & v.i.
1. To treat or act as a deadhead.
2. In railroading, to travel With empty cars or with no cars at all: said of locomotives.