A ouija board is a board with the letters of the alphabet written on it. It is used to ask questions which are thought to be answered by the spirits of dead people.
Ouija board in British English
(ˈwiːdʒə)
noun
trademark(also without capital)
a board on which are marked the letters of the alphabet. Answers to questions are spelt out by a pointer or glass held by the fingertips of the participants, and are supposedly formed by spiritual forces