n. A sending of an agent or a messenger; a charge given to go and perform some service; delegation for a specific duty or purpose: as, to be sent on a mission to a foreign government, or to the heathen.n. That for which one is sent or commissioned; the power conferred or duty imposed on an envoy or messenger; a delegated business or function; an errand.n. Hence That for which a person or thing is destined or designed; predestined function; determinate purpose or object.n. An organized effort for the spread of religion, or for the enlightenment and elevation of some community or region; organized missionary effort; religious propagaudism: as, Christian missions; the home and foreign missions of the Presbyterian Church; domestic missions; the city mission.n. In the Roman Catholic and Anglican churches, a series of special religious services organized to quicken the piety of Christians and convert the impenitent. The person appointed to conduct such a mission is termed a missioner.n. A particular field of missionary activity; a missionary post or station, or the body of missionaries established there; a center of organized missionary effort or of religious propagandism; specifically, in the Roman Catholic Church, the district assigned to a missionary priest.n. The office or establishment of a foreign envoy; the charge or post of an ambassador; a foreign legation: as, the mission to Persia; the members of the British mission at Washington.n. Dismission; discharge from service.n. Synonyms Office, duty, charge, embassy.To send on a mission; commission.