submarine | meaning of submarine in Longman Dictionary of Contemporary English | LDOCE

From Longman Dictionary of Contemporary EnglishWater, Navysubmarinesub‧ma‧rine1 /ˈsʌbməriːn, ˌsʌbməˈriːn/ ●●○ (also sub) noun [countable]    TTWPMNa ship, especially a military one, that can stay under water  a nuclear submarineExamples from the Corpussubmarine• Around 100 submarines withdrawn from service are moored at sea because there are no facilities for treating their radioactive components.• He was executive officer aboard the Honolulu, a nuclear attack submarine.• A ship could nevertheless be navigated accurately, especially when up-to-date hydrographic data was available from offshore surveys by submarines.• The McKee, with its crew of 1,515 officers and sailors, is a full-service repair ship for submarines.• a nuclear submarine• If you stopped the flights, Soviet submarines would go undetected.• The bows sliced across the forward hull tearing a great gash, but the submarine bounced rather than being ripped instantly in two.Water, Oceanographysubmarinesubmarine2 adjective [only before noun]    TTWHEOgrowing or used under the sea  submarine plant lifeExamples from the Corpussubmarine• submarine mountain ranges• The thermal input from hydrothermal springs along submarine spreading centers may drive major patterns of deepwater circulation.Origin submarine2 (1600-1700) sub- + marine