1. Used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more)
   "The synergistic effect of the two medications was more powerful than expected";
   - interactive
    
2. Working together; used especially of groups, as subsidiaries of a corporation, cooperating for an enhanced effect
   "a synergistic effect";
   - synergetic
    
3. Of or relating to the theological doctrine of synergism
   "The synergistic view emphasizes human cooperation with divine grace in salvation"

See also: cooperative

Encyclopedia: Synergistic