Webster's English Dictionary

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behavior

be.hav.ior or be.hav.iour \bi-'ha--vy*r\ \-vy*-r*l\ \-r*-le-\ n [alter. of 
   ME behavour, fr. behaven] chiefly Brit  1: the manner of conducting oneself 
    2: the way in which something behaves  - be.hav.ior.al aj