SYNERGISTIC Meaning of SYNERGISTIC in English [syn.er.gis.tic] adj (ca. 1847) 1: having the capacity to act in synergism "~ drugs" 2: of, relating to, or resembling synergism "a ~ reaction" -- syn.er.gis.ti.cal.ly adv Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012