adjective
always used before a noun
of or relating to the sea or the plants and animals that live in the sea
of or relating to sailing on the sea or doing business (such as trading) by sea
noun
or Marine , pl -rines
[count] :a member of the U.S. Marine Corps or the British Royal Marines
the Marines
the part of a country's military forces that includes soldiers who serve on a ship or are closely associated with a naval force :the U.S. Marine Corps or the British Royal Marines