English

Definition of U-boat noun from the Oxford Advanced Learner's Dictionary

 

U-boat

 noun
noun
BrE BrE//ˈjuː bəʊt//
 
; NAmE NAmE//ˈjuː boʊt//
 
Types of boats and ships
 
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a German submarine (= a ship that can travel underwater) See related entries: Types of boats and ships Word Originfrom German U-boot, abbreviation of Unterseeboot ‘undersea boat’.
See the Oxford Advanced American Dictionary entry: U-boat