1. A person who favors a political philosophy of progress and reform and the protection of civil liberties; SYN. progressive.
2. A person who favors an economic theory of laissez-faire and self-regulating markets.

1. (Homonym: wig).
2. A member of the Whig Party in the US in pre-Civil-War times.
3. A supporter of the American Revolution.
4. Member of a party that urged social reform in 19th century England.

Pertaining to the Whig party.