A Deadhead or Dead Head is a fan of the American rock band the Grateful Dead. In the s, a number of fans began travelling to see the band in as many shows or festival venues as they could. With large numbers of people thus attending strings of. A Deadhead or Dead Head is a fan of the American rock band the Grateful Dead. In the s, a number of fans began travelling to see the band in as many shows. Deadhead definition is - one who has not paid for a ticket. How to use deadhead in a sentence. Deadhead definition, a person who attends a performance, sports event, etc., or travels on a train, airplane, etc., without having paid for a ticket. First, what exactly is deadheading? This gardening term simply means to remove the old spent blooms including any developing seed from a plant to help keep it. Most annuals and many perennials will continue to bloom throughout the growing season if they are regularly deadheaded. Deadheading is the. Deadheading refers to removing spent or faded flowers from both annual and perennial plants. Typically, once a plant has finished flowering, it suspends the. Deadheading is the term used for the removal of flowers from plants when they are fading or dead. It is done to keep plants looking attractive and encourage. Define deadhead. deadhead synonyms, deadhead pronunciation, deadhead translation, English dictionary definition of deadhead. n. 1. A person who uses a free. deadhead — ▫ I. deadhead dead‧head 1 [ˈdedhed] noun [countable] informal TRAVEL someone who avoids paying their fare on a train, bus etc [m0] ▫.