n, pl  -ties  1  :  the quality or state of being susceptible  :  the state of being predisposed to, sensitive to, or of lacking the ability to resist something (as a pathogen, familial disease, or a drug)  :  SENSITIVITY  2 a  :  the ratio of the magnetization in a substance to the corresponding magnetizing force - see PARAMAGNETIC   b  :  the ratio of the electric polarization to the electric intensity in a polarized dielectric .
 
 
 
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