elector

Short definition from Wiktionary

Noun

1. 1
   A person eligible to vote in an election; a member of an electorate, a voter.
2. 2
   A person eligible to vote in an election; a member of an electorate, a voter: A person eligible to vote to elect a Member of Parliament.
3. 3
   A person eligible to vote in an election; a member of an electorate, a voter: A member of an electoral college; specifically (US) an official selected by a state as a member of the Electoral College to elect the president and vice president of the United States.
4. 4
   A person eligible to vote in an election; a member of an electorate, a voter: Alternative letter-case form of Elector (“a German prince entitled to elect the emperor of the Holy Roman Empire”).
5. 5
   A German prince entitled to elect the emperor of the Holy Roman Empire; a prince-elector.