Meaning & use
U-boat
A German military submarine, especially one used during the First or Second World War.
See it in a sentence
A U-boat torpedoed the merchant ship in the North Atlantic.
Convoys crossed the ocean in groups to defend against attacking U-boats.
A note on using this word
U-boat comes from the German Unterseeboot, meaning underwater boat, and refers specifically to German submarines.
Words with a similar meaning
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