It is a signal that causes an animal to react in some way. Some stimulus comes from outside the animal's body, while other stimulus, like thirst, come from inside the animal's body. The animal's reaction to the stimulus is called a response
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stimulus can be a object , piece of writing or a a photo that you can use to help create a performance in dramaA 'Stimulus' is a prop mostly used in plays or theatres that you build up a story on. For Example, you could use a torch if you are doing a scene of a play when you have to search for something or someone in the dark. Then you build up more ideas on it.
stimulus (physiology), something external that affects a sensory receptor and influences an activity
stimulus (psychology), a concept in behaviorism
I don't really know. I think it has to deal with the economy and the way we use our money. Stimuli are what people react to. For example, if a person sees a fly, this is a stimulus that would make that person swat the fly.