aggressor

from WordNet (r) 3.0 (2006)
aggressor
    n 1: someone who attacks [syn: {attacker}, {aggressor},
         {assailant}, {assaulter}]
    2: a confident assertive person who acts as instigator
from The Collaborative International Dictionary of English v.0.48
Aggressor \Ag*gres"sor\, n. [L.: cf. F. agresseur.]
   The person who first attacks or makes an aggression; he who
   begins hostility or a quarrel; an assailant.
   [1913 Webster]

         The insolence of the aggressor is usually proportioned
         to the tameness of the sufferer.         --Ames.
   [1913 Webster]
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
AGGRESSOR, crim. law. He who begins, a quarrel or dispute, either by
threatening or striking another. No man may strike another because he has
threatened, or in consequence of the use of any words.
antiflux / dictionary / aggressor
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