Definition of “firm sth up” - English Dictionary

“firm sth up” in Business English

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firm sth up

phrasal verb with firm uk /fɜːm/ us 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)