firm1 Pronunciation: /fɜːrm; fɜːm/Translate firm | into French | into German | into Italian Spanish translation of firmadj 1 a (secure) [grasp] firme b (not yielding) [surface/muscles] firme; [mattress] duro; [foundation] sólido 2 a (steadfast) [friendship] sólido; [support] firme b (strict) estricto 3 (definite) [offer/date] en firmefirm in other Oxford dictionaries Definition of firm in the British & World English dictionary Definition of firm in the US English dictionary