1. the act of perceiving; observation; attention: to escape notice. 2. take notice to pay attention; attend. 3. take no notice of to ignore or disregard. 4. information about a future event; warning; announcement. 5. a displayed placard or announcement giving information.
Nicotine: A Stimulant Nicotine, the chemical that makes addicts out of cigarette smokers, is a stimulant with properties similar to those of cocaine and amphetamine (speed). Nicotine provides the pick-me-up that smokers feel.
Wiktionary (0.00 / 0 votes) Rate this definition: stimulant (Noun). A substance that acts to increase physiological or nervous activity in the body. stimulant (Noun). Something that promotes activity, interest, or enthusiasm. stimulant (Adjective). Acting as a stimulant.