a well-ventilated, usually screened porch or gallery used as an occasional sleeping place
sleeping porch in American English
noun
a porch enclosed with glass or screening or a room with open sides or a row of windows used for sleeping in the open air
Word origin
[1880–85]This word is first recorded in the period 1880–85. Other words that entered Englishat around the same time include: Chief of Staff, highball, interface, quotation mark, rain check