Definition of Assumption

• a statement that is assumed to be true and from which a conclusion can be drawn; "on the assumption that he has been injured we can infer that he will not to play"
• a hypothesis that is taken for granted; "any society is built upon certain assumptions"
• celebration in the Roman Catholic Church of the Virgin Marys being taken up into heaven when her earthly life ended; corresponds to the Dormition in the Eastern Orthodox church