When something is synergistic, it means various parts are working together to produce an enhanced result. If you’ve just heard a synergistic symphony, the musicians must have played very well together.

You’ve probably heard the phrase “more than the sum of its parts.” The prefix syn- means "together with" or "united." When synergistic parts work together, they accomplish more than they could alone. Synergetic is often used to describe the effect of drugs working together — where one drug increases the other’s effectiveness. Synergistic can also describe the cooperative efforts of several people working together — like a team of superheroes fighting crime.

Definitions of synergistic

adj working together; used especially of groups, as subsidiaries of a corporation, cooperating for an enhanced effect

“a synergistic effect”
done with or working with others for a common purpose or benefit

adj used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more)

antagonistic, incompatible
used especially of drugs or muscles that counteract or neutralize each other's effect
acting to neutralize acid (especially in the stomach)
counteracting inflammation
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adj of or relating to the theological doctrine of synergism

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