Webster's English Dictionary

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polarity

po.lar.i.ty \po--'lar-*t-e--, p*-\ n 1: the quality or condition inherent 
   in a body that exhibits opposite prope rties or powers in opposite parts or 
   directions or that exhibits contrasted properties or powers in contrasted 
   parts or directions 2: attraction toward a particular object or in a 
   specific direction  3: the particular state either positive or negative 
   with reference to the t wo poles or to electrification 4a: diametrical 
   opposition  4b: an instance of such opposition