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Definition
A keyword: an important word to learn firm1   Show phonetics
adjective
1 NOT SOFT not soft, but not completely hard
A firm bed is better for your back.

2 FIXED [always before noun] certain or fixed and not likely to change
We don't have any firm plans for the weekend yet.
I'm a firm believer in equal rights.

3 STRONG strong and tight
a firm handshake/grip

4 STRICT strict and making certain that people do what you want
You've got to be firm with children.
firmly adverb
firmness noun [U]

The first and last word in dictionaries