simple past tense and past participle of firm

plural of firmness

the guaranteed power provided by a power plant or transmission system

(UK, business, finance) A company that funds its operations by taking out loans.

(transitive, idiomatic) To make tentative plans more definite. / (transitive) To make muscles more toned through physical exercise.

To resist assault or pressure.

(law) A business formed by one or more lawyers to engage in the practice of law.

(soccer) Collectively, the two Scottish football teams Rangers and Celtic, both based in Glasgow, which are the most successful teams in Scotland. They have a fierce and long-standing rivalry.

A company of swindlers who obtain goods on pretence of being established in business, and then decamp without payment to do the same elsewhere.

Alternative spelling of interfirm