adjective

1. 1. of the sea or ocean
   2. inhabiting, found in, or formed by the sea
2. 1. of navigation on the sea; nautical
   2. of shipping by sea; maritime
3. used, or to be used, at sea a marine engine
4. 1. trained for service at sea and on land, as certain troops
   2. of such troops

Etymology: ME maryne < L marinus < mare, the sea: see mare

noun

1. 1. a member of a marine military force
   2. ☆ a member of the United States Marine Corps
2. naval or merchant ships collectively; seagoing ships; fleet the merchant marine
3. in some countries, the department of government in charge of naval affairs
4. a picture of a ship or a sea scene