stimulus

stimulus definitions

noun
  • A sting on the body of a plant or insect. 

  • Something external that elicits or influences a physiological or psychological activity or response, or that affects any of the sensory apparatuses. 

  • An external phenomenon that has an influence on a system, by triggering or modifying an internal phenomenon; for example, a spur or incentive that drives a person to take action or change behaviour.