from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A submarine of the German navy.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any German submarine of the First or Second World War, or any Austro-Hungarian submarine of the First World War.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a submersible warship usually armed with torpedoes
Translation of German U-Boot, short for Unterseeboot : unter, under (from Middle High German under, from Old High German untar; see n̥dher- in Indo-European roots) + See, sea (from Middle High German sē, from Old High German) + Boot, boat.(American Heritage® Dictionary of the English Language, Fourth Edition)
A calque of German U-Boot. (Wiktionary)