Definition of extrusion noun from the Oxford Advanced Learner's Dictionary

     

    extrusion

     noun
    noun
    BrE BrE//ɪkˈstruːʒn//
     
    ; NAmE NAmE//ɪkˈstruːʒn//
     
    [uncountable]
     
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  1. 1(formal) the act of forcing or pushing something out of something; the act of being forced or pushed in this way the extrusion of lava
  2. 2(specialist) the act of shaping metal or plastic by forcing it through a hole aluminium extrusion