Definition of "missionary"

One who is sent on a mission.  examples

(religion) A person who travels attempting to spread a religion or creed (Particularly used in context of Christianity).  examples

(derogatory) A religious messenger.  examples

(uncountable) The missionary position for sexual intercourse.  examples

(uncountable, slang) Sexual intercourse in the missionary position.

Relating to a (religious) mission.  examples