go down
phrasal verb with go verb uk/ɡəʊ/ usgoing | went | gone
[ I ]
to become less in amount, value, etc.:
go down (sth) to sth The company's shares went down 7p to 53p.
[ I ] IT
if a computer system goes down, it stops working:
The battery should prevent the computer system from going down in the event of a power cut.