› agreed or decided and not likely to change: firm date/deadline I was given a firm deadline of April 30.firm bid/commitment The group said it has a firm commitment to sell two radio stations in Chicago to minority partners.firm order/offer They already have firm orders for much of the new stock.firm decision We haven't made a firm decision as yet.
› FINANCE used to describe a price or level that is high and is likely to rise or stay high: Home prices are edging higher as builders pay record prices for lumber, and tight supplies should keep prices firm next year. → See also steady hold firm › to remain at a high level: Top share prices held firm through to the close, with the main index up 27.8.
firmness noun [U] › the firmness of the bond market