Dictionary

One with liberal views, supporting individual liberty (see Wikipedia's article on Liberalism).

Someone left-wing; one with a left-wing ideology.

A supporter of any of several liberal parties.

One who favors individual voting rights, human and civil rights, and laissez-faire markets (also called "classical liberal"; compare libertarian).

(now rare outside set phrases) Pertaining to those arts and sciences the study of which is considered to provide general knowledge, as opposed to vocational/occupational, technical or mechanical training.

Example: 1983, David Leslie Wagner, The Seven liberal arts in the Middle Ages

Generous; willing to give unsparingly.

Example: He was liberal with his compliments.

Ample, abundant; generous in quantity.

Example: Add a liberal sprinkling of salt.

Unrestrained, licentious.