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English definition of “firm”

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firm

adjective uk   /fɜːm/ us    /fɝːm/

firm adjective (HARD)

B2 not soft but not completely hard: I'd rather sleep on a firm mattress than a soft one. These pears are still too firm to eat.
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firm adjective (FIXED)

well fixed in place or position: The bridge provided a firm platform for the bungee jumpers. fixed at the same level or opinion and not changing: The government remains firm in its opposition to tax reform.
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firm adjective (STRONG)

C2 strong and tight: a firm handshake Keep a firm hold of the handrail as you go down. figurative No one seems to have a firm grip on the company at the moment. figurative You need a firm grasp of mathematics to become an astronaut.
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firm adjective (CERTAIN)

B2 certain and not likely to change: He is a firm believer in traditional family values. Some people still claim that there is no firm evidence linking smoking with lung cancer.
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firm adjective (FORCEFUL)

C2 forceful and making people do what you want: I was always very firm with my children - they knew the rules and I made sure they followed them.

firm

noun [C] uk   /fɜːm/ us    /fɝːm/
B1 a company or business: He works for a law firm called Neil and Vigliano. He's just started working for an accountancy firm/a firm of accountants in Cambridge.
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firm

verb uk   /fɜːm/ us    /fɝːm/

firm verb (MAKE HARD)

UK [T] to make soil harder by pressing on it: Firm the soil around the cuttings and water them in.

firm verb (STOP CHANGING)

[I] specialized finance & economics to stop changing or to remain at the same level, amount, etc.: After a turbulent week on the markets, share prices firmed today.
(Definition of firm from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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