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English definition of “firmness”

firmness

noun [U] uk   /ˈfɜːm.nəs/ us    /ˈfɝːm-/

firmness noun [U] (HARDNESS)

the quality of not being soft, but not completely hard: The bed's firmness suited him.

firmness noun [U] (STRENGTH/TIGHTNESS)

the quality of being strong and tight: The firmness of his handshake reassured me.

firmness noun [U] (FORCEFUL QUALITY)

the quality of being forceful and making people do what you want: The new teacher has a reputation for firmness.

firmness noun [U] (CERTAINTY)

the quality of being certain and not likely to change
(Definition of firmness from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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