What does impulsive mean?
Impulsive describes behavior, choices, or forces that arise suddenly and bypass careful thought. An impulsive person may act on a strong emotion or urge before considering the consequences, while an impulsive decision or purchase is made with little deliberation. The term often carries a mildly critical connotation, suggesting haste, unpredictability, or possible regret, though it can also describe spontaneity and enthusiasm. In physics, an impulsive force is one applied over a very short interval, producing a sudden change in momentum. The word is especially useful when distinguishing a rapid reaction from a deliberate, considered course of action. It appears naturally in expressions such as “impulsive decision,” “impulsive behavior,” and “impulsive purchase,” and is related to the broader family of words connected with impulse, including impulse, impulsively, impulsiveness, and impulsivity.
Acting or done suddenly and without careful thought; characterized by a sudden urge.
"His impulsive response created more problems than it solved."
Often implies haste and a lack of deliberation, and is commonly used to describe decisions, actions, behavior, and purchases.
In physics, involving a force or effect concentrated into a very short period.
"The sudden stoppage of the vehicle produced an impulsive force at the barrier."
This is a technical usage, generally found in physics and engineering.
An impulsive choice can be lightning-fast—and just as quickly regretted.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does impulsive come from?
The word impulsive comes through French from Latin impulsivus, derived from impulsus, the past participle of impellere, meaning “to drive” or “to push.” The same Latin root is reflected in English words such as impulse, pulsate, propulsion, and repulse. In English, impulsive developed from its earlier sense of “driven by impulse” into its modern meanings of acting rashly and, in technical use, applying force briefly.
Related word forms
How impulsive is actually used
Often mildly critical, especially when describing behavior, decisions, or spending. In technical contexts, especially physics, it describes a brief concentration of force or momentum.
Easily confused with impulsive
An impulse is the sudden urge itself, whereas an impulsive person, action, or decision is characterized by acting on such an urge without careful thought.