FEDERATE Meaning of FEDERATE in English [fed.er.ate] adj [L foederatus, fr. foeder-, foedus] (1710): united in an alliance or federation: federated [2]fed.er.ate vt -at.ed ; -at.ing (1837): to join in a federation Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012