1. (a.) Of or pertaining to the sea; as, marine biology\; having to do with the ocean, or with navigation or naval affairs; nautical; as, marine productions or bodies; marine shells; a marine engine.

2. (a.) Formed by the action of the currents or waves of the sea; as, marine deposits.

3. (n.) A solider serving on shipboard; a sea soldier; one of a body of troops trained to do duty in the navy.

4. (n.) The sum of naval affairs; naval economy; the department of navigation and sea forces; the collective shipping of a country; as, the mercantile marine.

5. (n.) A picture representing some marine subject.

Naval Construction Battalion Naval Reservist RN Royal Marine Royal Navy Seabee Seabees USN United States Navy abyssal aquatic argosy armada bathyal bathybic bathymetric bathyorographical bathysmal benthic bluejacket boot cadet coast guard deep-sea division escadrille fleet flotilla fluvial fluviatile frogman gob horse marine hydrographic jolly lacustrine maritime merchant fleet merchant marine merchant navy midshipman midshipmite mosquito fleet nautical naval naval cadet naval forces naval militia naval reserve navigational navy navy man ocean-going oceanic oceanographic pelagic salty sea seafaring seagoing seamanlike seamanly squadron swabbie task force task group terriginous thalassic water-borne