Definition of constrain verb from the Oxford Advanced American Dictionary

      

    constrain

     verb
    verb
    NAmE//kənˈstreɪn//
     
    (formal)Verb Forms present simple I / you / we / they constrain
     
    he / she / it constrains
     
    past simple constrained
     
    -ing form constraining
     
     
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  1. 1[usually passive] constrain somebody to do something to force someone to do something or behave in a particular way The evidence was so compelling that he felt constrained to accept it. The company said that it was constrained to raise prices.
  2. 2[often passive] to restrict or limit someone or something constrain something Research has been constrained by a lack of funds. constrain somebody (from doing something) She felt constrained from continuing by the threat of losing her job. Men and women are becoming less constrained by stereotyped roles.
See the Oxford Advanced Learner's Dictionary entry: constrain