Webster's English Dictionary

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polarization

po.lar.iza.tion \.po--l*-r*-'za--sh*n\ n 1: the action of polarizing or 
   state of being polarized : as  1a1: the action or process of affecting 
   light or other radiation so that th e vibrations of the wave assume a 
   definite form 1a2: the state of radiation affected by this process  1b: the 
   deposition of gas on one or both electrodes of an electrolytic cell  
   increasing the resistance and setting up a counter electromotive force 1c: 
   MAGNETIZATION  2a: division into two opposites  2b: concentration about 
   opposing extremes of groups or interests formerly r anged on a continuum