Stimulation

Part of speech: noun (n.)

1. The act of stimulating, or the state of being stimulated.

2. The irritating action of various agents (stimuli) on muscles, nerves, or a sensory end organ, by which activity is evoked; especially, the nervous impulse produced by various agents on nerves, or a sensory end organ, by which the part connected with the nerve is thrown into a state of activity; irritation.