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

     

    firm

     verb
    verb
    BrE BrE//fɜːm//
     
    ; NAmE NAmE//fɜːrm//
     
    Verb Forms present simple I / you / we / they firm
    BrE BrE//fɜːm//
     
    ; NAmE NAmE//fɜːrm//
     
    he / she / it firms
    BrE BrE//fɜːmz//
     
    ; NAmE NAmE//fɜːrmz//
     
    past simple firmed
    BrE BrE//fɜːmd//
     
    ; NAmE NAmE//fɜːrmd//
     
    past participle firmed
    BrE BrE//fɜːmd//
     
    ; NAmE NAmE//fɜːrmd//
     
    -ing form firming
    BrE BrE//ˈfɜːmɪŋ//
     
    ; NAmE NAmE//ˈfɜːrmɪŋ//
     
     
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  1. 1[transitive] firm something to make something become stronger or harder Firm the soil around the plant. This product claims to firm your body in six weeks.
  2. 2[intransitive] firm (to/at…) (finance) (of shares, prices, etc.) to become steady or rise steadily The company's shares firmed 3p to 696p.
  3. Word Originverb Middle English: from Old French ferme, from Latin firmus. Phrasal Verbsfirm upfirm somethingup
See the Oxford Advanced American Dictionary entry: firm