noun Date: 1805 a sofa that can be made to serve as a bed by lowering its hinged upholstered back to horizontal position or by pulling out a concealed mattress
SOFA BED
Meaning of SOFA BED in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012