A Ouija (pronounced "weejah" or "Weegee") board has the alphabet, numbers, and a few short words (yes, no, goodbye) written on it, with a pointer called a planchette perched on top of it. Someone (often more than one person) touches a pointer and asks a question of the board. The pointer then may start to move, apparently on its own, and, it is hoped, provide an answer.
The belief is often that [...] [tvtropes.org]