Marine (ocean) definition

(1) Native to or inhabiting the sea

"Marine plants and animals such as seaweed and whales"

(2) Of or relating to the sea

"Marine explorations"

(3) Of or relating to military personnel who serve both on land and at sea (specifically the U.S. Marine Corps)

"Marine barracks"

(4) Relating to or involving ships or shipping or navigation or seamen

"Nautical charts"

"Maritime law"

"Marine insurance"

(5) A member of the United States Marine Corps

(6) A soldier who serves both on shipboard and on land