submarine

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈsʌbməriːn/

US:USA pronunciation: IPAUSA pronunciation: IPA/ˌsʌbməˈrin, ˈsʌbməˌrin/

US:USA pronunciation: respellingUSA pronunciation: respelling(n. sub′mə rēn, submə rēn′; adj., v. sub′mə rēn)


Inflections of 'submarine' (v): (⇒ conjugate)
submarines
v 3rd person singular
submarining
v pres p
submarined
v past
submarined
v past p

WordReference Random House Learner's Dictionary of American English © 2026
sub•ma•rine /ˌsʌbməˈrin, ˈsʌbməˌrin/USA pronunciation  n. [countable]
  1. Nautical, Naval Termsa vessel that can be submerged and moved under water:The submarine dove for the sea bottom.
  2. Dialect Terms[Chiefly Northeastern and North Midland U.S.]a hero sandwich.

adj. 
  1. situated, occurring, operating, or living under the surface of the sea.

WordReference Random House Unabridged Dictionary of American English © 2026
sub•ma•rine  (n. sub′mə rēn, submə rēn′;adj., v. sub′mə rēn),USA pronunciation n., adj., v., -rined, -rin•ing. 
n. 
  1. Nautical, Naval Termsa vessel that can be submerged and navigated under water, usually built for warfare and armed with torpedoes or guided missiles.
  2. something situated or living under the surface of the sea, as a plant or animal.
  3. Dialect Terms[Chiefly Northeastern and North Midland U.S.]a hero sandwich.

adj. 
  1. situated, occurring, operating, or living under the surface of the sea:a submarine mountain.
  2. Nautical, Naval Termsof, pertaining to, or carried on by a submarine or submarines:submarine warfare.

v.i. 
  1. to participate in the operating of a submarine.
  2. to move or slide under something.
  3. Slang Terms
    • to be thrown under the steering wheel of the vehicle one is driving during a frontal crash.
    • to be thrown out of one's seat belt in such a crash.

v.t. 
  1. to attack or sink by submarine.
  • 1640–50; 1895–1900 for def. 1; sub- + marine
    3. See hero sandwich. 

Collins Concise English Dictionary © HarperCollins Publishers::
submarine /ˈsʌbməˌriːn; ˌsʌbməˈriːn/ n
  1. a vessel, esp one designed for warfare, capable of operating for protracted periods below the surface of the sea
  2. (modifier)
    • of or relating to a submarine: a submarine captain
    • occurring or situated below the surface of the sea: a submarine cable
'submarine' also found in these entries (note: many are not synonyms or translations):

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