U-boat
noun
RareNot in standard dictionaries
1
Any German submarine of the First or Second World War, or any Austro-Hungarian submarine of the First World War.
2
A narrow utility cart with tall handles on both ends that is used to carry loads of retail products to be sold, so named because its shape is roughly that of a capital U.
3
Nickname given to the General Electric Universal Series diesel-electric locomotives.
#slang