impulsive (Adjective) — Proceeding from natural feeling or impulse without external stimulus. ex. "an impulsive gesture of affection"
impulsive (Adjective) — Without forethought. ex. "letting him borrow her car was an impulsive act that she immediately regretted"
impulsive (Adjective) — Having the power of driving or impelling. ex. "an impulsive force"
impulsive (Adjective) — Determined by chance or impulse or whim rather than by necessity or reason.
impulsive (Adjective) — Characterized by undue haste and lack of thought or deliberation. ex. "liable to such impulsive acts as hugging strangers"