Had an impulse to run away; an impulse of regret that made me hesitate; bought a hat on impulse.
An impulse shopper; impulse buying.
An example of impulse is when you suddenly have the urge to go to Vegas.
An example of impulse is when you purchase something without thinking about it.
Origin of impulse
- Latin impulsus from past participle of impellere to impel impel
From American Heritage Dictionary of the English Language, 5th Edition