<p><strong>Noun</strong></p><ul><li>a person who attends a performance, sports event, etc., or travels on a train, airplane, etc., without having paid for a ticket, especially a person using a complimentary ticket or free pass.</li><li>a train, railroad car, airplane, truck, or other commercial vehicle while operating empty, as when returning to a terminal.</li><li>a stupid or boring person; dullard.</li><li>Metallurgy: excess metal in the riser of a mold.</li><li>a sunken or partially sunken log.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to transport (someone) as a deadhead.</li><li>to move (an empty commercial vehicle) along a route.</li><li>Horticulture: to remove faded blooms from (ornamental plants), especially in flower gardens, often to help continued blooming.</li><li>(used without object) to act or serve as a deadhead.</li><li>(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.</li></ul>