a long comfortable seat for two or more people to sit on 長沙發；長榻 
He was sprawled on the living-room couch watching TV. 他四肢舒展地躺在客廳沙發上看電視。 They sat down on the wide couch. 他們坐到寬大的長沙發上。
Extra ExamplesTopics Houses and homesb2She settled down to read on the huge, overstuffed couch. 她在軟綿綿的大沙發裏坐下讀書。 The room contained an old worn couch. 房間裏有一個破舊的老沙發。 You can sleep on the pull-out couch. 你可以睡在活動沙發床上。
Oxford Collocations Dictionaryadjective- comfortable
- comfy
- plush
- …
- lie (down) on
- recline on
- sink back on
- …
- cushion
- pillow
- potato
- …
- on a/the couch
a long piece of furniture like a bed, especially in a doctor’s office （尤指診室内的）診察台 She spends several hours a week on the psychiatrist's couch. 她每周都要看幾個小時的精神科醫生。
Oxford Collocations Dictionaryadjective- comfortable
- comfy
- plush
- …
- lie (down) on
- recline on
- sink back on
- …
- cushion
- pillow
- potato
- …
- on a/the couch
Word OriginMiddle English (as a noun denoting something to sleep on; as a verb in the sense ‘lay something down’): from Old French couche (noun), coucher (verb), from Latin collocare ‘place together’, from col- ‘together’ + locare ‘to place’.