Definition of greenbackers:
(n) :
(historical, US) A member of the Greenback Party, who supported greenback or paper money, and opposed the resumption of specie payments (see Specie Payment Resumption Act).
(n) :
Alternative form of Greenbacker. [(historical, US) A member of the Greenback Party, who supported greenback or paper money, and opposed the resumption of specie payments (see Specie Payment Resumption Act).]