U-boat Definition

yo͝obōt
noun
A German submarine in service during WWI or WWII.
Webster's New World
Synonyms:

Other Word Forms of U-boat

Noun

Singular:
U-boat
Plural:
u-boats

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