寝しん台だいalso: ねだいしんだいCommon wordJLPTN2Freq.FrequencyTop 20,000Meanings1nounbed; couchRefers to a piece of furniture for sleeping or resting, similar to a bed or couch. Often used in compounds like 寝台車 (sleeping car).寝しん台だいに横よこになって本ほんを読よんだ。I lay down on the bed and read a book.この寝しん台だいはとても硬かたい。This bed is very hard.