(1):

(n.) Government by the people; a form of government in which the supreme power is retained and directly exercised by the people.

(2):

(n.) Government by popular representation; a form of government in which the supreme power is retained by the people, but is indirectly exercised through a system of representation and delegated authority periodically renewed; a constitutional representative government; a republic.

(3):

(n.) Collectively, the people, regarded as the source of government.

(4):

(n.) The principles and policy of the Democratic party, so called.