liberal (n.)youdaoicibaDictYouDict
1820, "member of the Liberal party of Great Britain," from liberal (adj.). Used early 20c. of less dogmatic Christian churches; in reference to a political ideology not conservative or fascist but short of socialism, from c. 1920.
This is the attitude of mind which has come to be known as liberal. It implies vigorous convictions, tolerance for the opinions of others, and a persistent desire for sound progress. It is a method of approach which has played a notable and constructive part in our history, and which merits a thorough trial today in the attack on our absorbingly interesting American task. [Guy Emerson, "The New Frontier," 1920]