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English definition of “firm sth up”

firm sth up

phrasal verb with firm
 
 
/fɜːm/ verb [I]
to make something more definite or less likely to change: firm up an agreement/an order/a price The company is attempting to firm up potential orders for four ferries and two cruise ships.
(Definition of firm sth up from the Cambridge Business English Dictionary © Cambridge University Press)
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