Double up as
/ˈdʌbl ʌp æz/B2
UpperIntermediate
1. To serve the purpose of something in addition to its intended function.
- The sofa doubles up as a bed in the living room.
- This backpack doubles up as a laptop case.
- The stadium doubles up as a concert venue on weekends.
- Many parents' cars double up as mobile offices.
- The ruler doubles up as a straight edge.
Synonyms:
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