Definitions
1.nounThat which impels or gives an impulse; an impelling agent.
2.nounOne whose behaviour or personality is characterized by being impulsive.
3.adjectiveHaving the power of driving or impelling; giving an impulse; moving; impellent.
4.adjectiveActuated by impulse or by transient feelings; inclined to make rapid decisions without due consideration.
5.adjectiveActing momentarily, or by impulse; not continuous – said of forces.