The Collaborative International Dictionary of English v.0.48:
Voter \Vot"er\, n. One who votes; one who has a legal right to vote, or give his suffrage; an elector; a suffragist; as, an independent voter. [1913 Webster]WordNet (r) 3.0 (2006):
voter n 1: a citizen who has a legal right to vote [syn: voter, elector]Bouvier's Law Dictionary, Revised 6th Ed (1856):
VOTER. One entitled to a vote; an elector.