A person who has the right to vote in an election. Every elector in the district received a pamphlet explaining the voting process.
A member of the electoral college in the United States, who formally elects the president and vice president. The elector cast their vote for the presidential candidate who won the popular vote in their state.
In historical contexts, a German prince entitled to take part in the election of the Holy Roman Emperor. The elector of Saxony played a crucial role in the election of the new emperor.