Tory is the most common colloquial term for members and supporters of the Conservative Party. The party as a whole is thus referred to as 'the Tories'.
The term Tory or Loyalist was used in the American Revolution to describe those who remained loyal to the British Crown. Since early in the eighteenth century, Tory had described those upholding the right of the Kings over parliament. During the revolution, particularly after the Declaration of Independence in 1776 this use was extended to cover anyone who remained loyal to the British Crown.