Séance

A séance or seance is an attempt to communicate with spirits. The word séance comes from the French word for “session”, from the Old French seoir, “to sit”. In French, the word’s meaning is quite general: one may, for example, speak of “une séance de cinéma” (“a movie session”). In English, however, the word came to be used specifically for a meeting of people who are gathered to receive messages from ghosts or to listen to a spirit medium discourse with or relay messages from spirits. In modern English usage, participants need not be seated while engaged in a séance.

(Wikipedia)