1. [noun] (Can we clean up([1]) this sense?) Anything that may have an impact or influence on a system.
2. [noun] (Can we clean up([1]) this sense?) (physiology) Something external that elicits or influences a physiological or psychological activity or response.
3. [noun] (Can we clean up([1]) this sense?) (psychology) Anything effectively impinging upon any of the sensory apparatuses of a living organism, including physical phenomena both internal and external to the body.
4. [noun] (Can we clean up([1]) this sense?) Anything that induces a person to take action.
5. [noun] Any stimulating information or event; acts to arouse action.
