u-boat
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Nickname given to the General Electric Universal Series diesel-electric locomotives.
Register: slang
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “u-boat” mean?
Nickname given to the General Electric Universal Series diesel-electric locomotives.
Is “u-boat” formal or informal?
u-boat is generally slang.