impulse
//ˈɪmpʌls//
Noun
impulseSingular
impulsesPlural
1
A sudden strong desire or urge to act without thinking about the consequences
I had a sudden impulse to buy the expensive watch.
2
A force or stimulus that causes something to happen or move; a driving force
The impulse for change came from the younger generation.
3
In physics, a force acting briefly on a body and producing a change in momentum
The impulse from the collision changed the ball's momentum.
4
In physiology, a signal transmitted through nerve fibers or muscle tissue
Nerve impulses travel rapidly through the body to control muscle movement.