The term DEAD HEAD is composed of two crossword solutions, DEE (3 letters) and GHOST (5 letters). DEE is a shortened form of the name 'DIANA' or 'DIANE', which is a female given name of Greek origin. GHOST is a noun that refers to the soul of a DEAD person, believed to be able to appear in visible form or otherwise make its presence known to the living. Together, DEAD HEAD can refer to someone who is a fan of the band Grateful DEAD, or it can refer to a person who has died.