an inexpensive berth on a European train, consisting of a shelflike bed that folds down to allow passengers to sleep in their clothes: there are usually four couchettes in a first-class compartment and six in a second-class compartment
See couchette in American Heritage Dictionary 4
(ko͞o-shĕtˈ)
noun
A compartment on a European passenger train equipped with four to six berths for sleeping.