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

     

    condition

     verb
    verb
    BrE BrE//kənˈdɪʃn//
     
    ; NAmE NAmE//kənˈdɪʃn//
     
    Verb Forms present simple I / you / we / they condition
    BrE BrE//kənˈdɪʃn//
     
    ; NAmE NAmE//kənˈdɪʃn//
     
    he / she / it conditions
    BrE BrE//kənˈdɪʃnz//
     
    ; NAmE NAmE//kənˈdɪʃnz//
     
    past simple conditioned
    BrE BrE//kənˈdɪʃnd//
     
    ; NAmE NAmE//kənˈdɪʃnd//
     
    past participle conditioned
    BrE BrE//kənˈdɪʃnd//
     
    ; NAmE NAmE//kənˈdɪʃnd//
     
    -ing form conditioning
    BrE BrE//kənˈdɪʃnɪŋ//
     
    ; NAmE NAmE//kənˈdɪʃnɪŋ//
     
    Styling hair
     
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  1. 1[usually passive] to train somebody/something to behave in a particular way or to become used to a particular situation condition somebody/something (to something) the difference between inborn and conditioned reflexes (= reactions that are learned/not natural) Patients can become conditioned to particular forms of treatment. condition somebody/something to do something The rats had been conditioned to ring a bell when they wanted food.
  2. 2condition somebody/something to have an important effect on somebody/something; to influence the way that something happens Gender roles are often conditioned by cultural factors. National choices are conditioned by the international political economy.
  3. 3condition something to keep something such as your hair or skin healthy a shampoo that cleans and conditions hair a polish for conditioning leather See related entries: Styling hair
  4. Word Origin Middle English: from Old French condicion (noun), condicionner (verb), from Latin condicio(n-) ‘agreement’, from condicere ‘agree upon’, from con- ‘with’ + dicere ‘say’.
See the Oxford Advanced American Dictionary entry: condition