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\ ˈyü-ˌbōt 
\
\Definition of U-boat
: a German submarine
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More Definitions for U-boat
U-boat
nounEnglish Language Learners Definition of U-boat
: a German submarine
See the full definition for U-boat in the English Language Learners Dictionary
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Time Traveler for U-boat
The first known use of U-boat was in 1914
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