1. Members or supporters of the Greenback Party, a U.S. political party of the late 19th century that advocated for paper money (greenbacks) as legal tender.
Usage: historical; plural form; chiefly U.S.

Examples

• The greenbackers believed that increasing the money supply would help farmers and workers.
• In the 1880s, greenbackers ran candidates in several states to challenge the two major parties.
• The greenbackers' platform focused on monetary reform and opposition to gold-standard policies.
• Many rural voters supported the greenbackers during the economic depression of the 1870s.