Definition of "inhibitory"

inhibitory

adjective
1. That inhibits.
  Quotations
  Numerous experiments show that the brain exercises an inhibitory action over the reflex movements, and that the more active that organ, the more they are under control.
  29 October 1886 , Charles Richet, "A Psychological Study of Fear", in Popular Science Monthly Volume 29
2. Of, or relating to an inhibitor.