Webster's Revised Unabridged Dictionary · 1913

Missionary

Missionary , noun

[Compare French missionnaire. See Mission, n.]

One who is sent on a mission; especially, one sent to propagate religion. — Swift
Collocations (1)
Missionary apostolic , a Roman Catholic missionary sent by commission from the pope.

Missionary , adjective

Of or pertaining to missions; as, a missionary meeting; a missionary fund.