Bedeutung von “double (up) as sth” — Learner’s Dictionary

double (up) as sth

phrasal verb with double us uk /ˈdʌbl/ verb [ I, T ]

If something doubles up as something else, it also has the purpose of that thing:

The school's gymnasium doubles up as a dining room.

(Definition von “double (up) as sth” aus dem Cambridge Learner's Dictionary © Cambridge University Press)