A small bed or sleeping berth, especially the fold-away or stacked beds found on trains or ships.
From French couchette (small bed), diminutive form of couche (bed), using the -ette suffix to create a smaller version.
The couchette system revolutionized train and ship travel by fitting multiple sleeping spaces into tight quarters—a genius piece of design that turned stuffy cabins into actual places where travelers could sleep on long journeys.
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