Informal.| 1. | a person who attends a performance, sports event, etc., or travels on a train, airplane, etc., without having paid for a ticket, esp. a person using a complimentary ticket or free pass. |
| 2. | a train, railroad car, airplane, truck, or other commercial vehicle while operating empty, as when returning to a terminal. |
| 3. | a stupid or boring person; dullard. |
| 4. | Metallurgy. excess metal in the riser of a mold. |
| 5. | a sunken or partially sunken log. |
| 6. | to transport (someone) as a deadhead. |
| 7. | to move (an empty commercial vehicle) along a route. |
| 8. | Horticulture. to remove faded blooms from (ornamental plants), esp. in flower gardens, often to help continued blooming. |
| 9. | to act or serve as a deadhead. |
| 10. | (of a commercial vehicle) to travel without cargo or paying passengers: The train carried coal to Pittsburgh and then deadheaded back to Virginia to pick up another load. |
deadhead
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