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English definition of “submarine”

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submarine

noun [C] uk   /ˌsʌb.məˈriːn/ /ˈsʌb.mə.riːn/ ( informal sub) us  
a ship that can travel underwater: a nuclear submarine a submarine base/commander
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submarine

adjective uk   /ˌsʌb.məˈriːn/ /ˈsʌb.mə.riːn/ specialized us  
existing below the surface of the sea
(Definition of submarine from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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