Stimulus Stimulus Sleepy Hollow (film) Category="Perception"The term "stimulus" (Plural: stimuli) has several related meanings:

In Physiology, a stimulus is something external that elicits or influences a physiological or psychological Activity or Response.
In Psychology, anything effectively impinging upon any of the sensory apparatuses of a living Organism, including physical phenomena both Internal and external to the Body. GOOSES
In other fields, a stimulus is anything that may have an Impact on a System; for example, an economic stimulus.

In most contexts, a stimulus can be described as "stimulating", thereby causing "Stimulation" or "over-stimulation".

Although related, the word's Meaning is distinct from that of "Stimulant."

See also