U-boats

noun
1.
a German submarine.
noun
1.
a German submarine, esp in World Wars I and II

U-boats definition

German submarines during World War I and World War II. U-boat is a translation of the German U-boot, which is short for Unterseeboot, or “undersea boat.”

Note: Lusitania was sunk by a U-boat. Eventually, U-boat attacks on neutral ships drew the United States into the war.

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