double as sth | ˌdouble ˈup as sth
to have another use or function as well as the main one :
The kitchen doubles as a dining room.
double as sth | ˌdouble ˈup as sth
to have another use or function as well as the main one :
The kitchen doubles as a dining room.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005