From Wikipedia, the free encyclopedia.
A mission literally means a something that is sent (from the Latin missum (sent)). Thus we may refer to space exploration expeditions as "missions", or to a diplomatic outpost as a "mission" in a foreign territory.
A widespread activity in religions of the proselytising kind comprises sending "missions" to convert and support new adherents. Some churches reflect the primacy of mission work in their structure and nomenclature. The term missionary stems from the proselytising sense of "mission". (see for instance: California mission).
The study of missions, particularly Christian missions, is missiology.