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Reactive

riˈaktɪv

Reactive definitions
adjective
reactive
  1. showing a response to a stimulus

    "pupils are reactive to light"

    responsive to quick to respond to sensitized to reactive to sentient of
    • showing an immune response to a specific antigen

      "lysosomal activity can activate B lymphocytes reactive against self-components"

    • (of a disease or illness) caused by a reaction to something

      "reactive arthritis"

    • having a tendency to react chemically

      "nitrogen dioxide is a highly reactive gas"

  2. acting in response to a situation rather than creating or controlling it

    "a proactive rather than a reactive approach"

  3. relating to reactance

    "a reactive load"