impulsive

adjective

im·​pul·​sive im-ˈpəl-siv How to pronounce impulsive (audio)
1
a
: arising from an impulse
an impulsive decision
b
: prone to act on impulse
an impulsive young man
2
: acting momentarily
3
: having the power of or actually driving or impelling
impulsively adverb
impulsiveness noun
impulsivity noun
Choose the Right Synonym for impulsive

spontaneous, impulsive, instinctive, automatic, mechanical mean acting or activated without deliberation.

spontaneous implies lack of prompting and connotes naturalness.

a spontaneous burst of applause

impulsive implies acting under stress of emotion or spirit of the moment.

impulsive acts of violence

instinctive stresses action involving neither judgment nor will.

blinking is an instinctive reaction

automatic implies action engaging neither the mind nor the emotions and connotes a predictable response.

his denial was automatic

mechanical stresses the lifeless, often perfunctory character of the response.

a mechanical teaching method

Examples of impulsive in a Sentence

I couldn't make out exactly what had happened, though I could guess how it started—the two of them talking, kidding around when Mrs. Ramsey came down to the library basement to file some periodicals, an impulsive kiss in the stacks … Tobias Wolff, Old School, 2003
There was an odd nobility, a knight-errant quality, about Alan—in his willingness to suffer for the sake of life itself, in his tendency to view himself under harsher light than he would turn on others, in his impulsive generosity. Tracy Kidder, Home Town, 1999
So speaks Maude Bailey, the celibate feminist scholar heroine of A. S. Byatt's fifth novel, as, in an impulsive collusion with a male scholar she scarcely knows, she runs off to Brittany. Joyce Carol Oates, Vogue, November 1990
She's impulsive and often does things that she later regrets. He needs to learn to control his impulsive behavior. She made an impulsive decision to quit her job.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
To tell the story of a middle-aged man’s impulsive leap into restaurant ownership, he’s gathered an accomplished cast wielding effortless charm. Sheri Linden, HollywoodReporter, 8 May 2025 Could this change in spending from non-essential items to more essential ones mean a realignment away from impulsive internet purchases and toward more bare essentials? Roger Valdez, Forbes.com, 7 May 2025 More love games for Ellie and Dina The show’s framing of Dina is overall very different, giving her much deeper tactical knowledge and street smarts than the more impulsive Ellie. Christopher Cruz, Rolling Stone, 5 May 2025 This was a sincere, musical Apollo — full of heat and strength, but also youthful and unaffected, impulsive and curious. Thea Traff, New York Times, 3 May 2025 See All Example Sentences for impulsive

Word History

Etymology

see impulse entry 1

First Known Use

15th century, in the meaning defined at sense 3

Time Traveler
The first known use of impulsive was in the 15th century

Browse Nearby Words

Cite this Entry

“Impulsive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impulsive. Accessed 19 May. 2025.

Kids Definition

impulsive

adjective
im·​pul·​sive im-ˈpəl-siv How to pronounce impulsive (audio)
1
: acting or tending to act on impulse
2
: resulting from a sudden impulse
impulsively adverb
impulsiveness noun

Medical Definition

impulsive

adjective
im·​pul·​sive im-ˈpəl-siv How to pronounce impulsive (audio)
1
: having the power of or actually driving or impelling
2
: actuated by or prone to act on impulse
impulsive behavior
3
: acting momentarily
brief impulsive auditory stimuli
impulsively adverb
impulsiveness noun
impulsivity noun
plural impulsivities

More from Merriam-Webster on impulsive

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