Definition of firm adverb from the Oxford Advanced Learner's Dictionary

 

firm

 adverb
adverb
BrE BrE//fɜːm//
 
; NAmE NAmE//fɜːrm//
 
 
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Word Originadverb Middle English: from Old French ferme, from Latin firmus.Idioms
hold firm (to something)
 
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(formal) to believe something strongly and not change your mind She held firm to her principles.
stand fast/firm
 
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to refuse to move back; to refuse to change your opinions
See the Oxford Advanced American Dictionary entry: firm