Definition of couchette noun from the Oxford Advanced Learner's Dictionary

 

couchette

 noun
noun
BrE BrE//kuːˈʃet//
 
; NAmE NAmE//kuːˈʃet//
 
Trains
 
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a narrow bed on a train, that folds down from the wall See related entries: Trains Word Origin 1920s: French, literally ‘little bed’, diminutive of couche ‘a couch’.
See the Oxford Advanced American Dictionary entry: couchette