From Longman Dictionary of Contemporary Englishimpulsiveim‧pul‧sive /ɪmˈpʌlsɪv/ ●○○ adjective CARELESSsomeone who is impulsive does things without considering the possible dangers or problems first → rash Rosa was impulsive and sometimes regretted things she’d done. In a burst of impulsive generosity, I offered to pay. —impulsively adverb ‘Oh, Anne, I do love you!’ he said impulsively. —impulsiveness noun [uncountable]
Examples from the Corpusimpulsive• And Anne - she's so impulsive.• The existence of will does not mean that behavior is never impulsive.• These children tend to be impulsive and restless.• Thus, it is not necessarily inconsistent to observe what seems to be impulsive behavior after the will is present.• an impulsive decision• Although she comes across as impulsive, Harper is actually very cautious and indecisive.• Kid that age, impulsive, headstrong: not much you can do.• Whether or not she believed his excuses, her own body, her own impulsive longings, would betray her.• His early training was in the sciences and he displays a cool rationality about what can be a rather impulsive profession.• It was all some impulsive reaction to her father.• She's so impulsive -- she saw the house for the first time and said she'd buy it straight away.