U-boat meaning

yo͝o'bōt'
A submarine of the German navy.
noun
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A German submarine in service during WWI or WWII.
noun
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Origin of u-boat

  • Translation of German U-Boot short for Unterseeboot unter under (from Middle High German under) (from Old High German untar n̥dher- in Indo-European roots) See sea (from Middle High German ) (from Old High German) Boot boat
    From American Heritage Dictionary of the English Language, 5th Edition