/mar"euh neuhr/ , n.
1. a person who directs or assists in the navigation of a ship; sailor.
2. ( cap. ) Aerospace. one of a series of U.S. space probes that obtained scientific information while flying by or orbiting around the planets Mars, Mercury, and Venus.
[ 1250-1300; ME marinier. See MARINE, -ER 2 ]
Syn. 1. seafarer. See sailor .