to double up as
dou
ˈdʌ
da
ble
bəl
bēl
up
ʌp
ap
as
æz
āz

Definition & Meaning of "double up as"in English

to double up as
01

to have another function in addition to the main one 

Grammatical Information
Composition
phrasal
Action verb
Regular
Inseparable
Particle
up as
Base verb
double
Present tense
double up as
3rd person singular
doubles up as
Present participle
doubling up as
Past simple
doubled up as
Past participle
doubled up as
Examples
The sofa doubles up as a guest bed. 
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