| Adj. | 1. | impulsive - proceeding from natural feeling or impulse without external stimulus; "an impulsive gesture of affection"self-generated, spontaneous - happening or arising without apparent external cause; "spontaneous laughter"; "spontaneous combustion"; "a spontaneous abortion" |
| 2. | impulsive - without forethought; "letting him borrow her car was an impulsive act that she immediately regretted" unpremeditated - not premeditated | |
| 3. | impulsive - having the power of driving or impelling; "a driving personal ambition"; "the driving force was his innate enthusiasm"; "an impulsive force" | |
| 4. | impulsive - determined by chance or impulse or whim rather than by necessity or reason; "a capricious refusal"; "authoritarian rulers are frequently capricious"; "the victim of whimsical persecutions" arbitrary - based on or subject to individual discretion or preference or sometimes impulse or caprice; "an arbitrary decision"; "the arbitrary rule of a dictator"; "an arbitrary penalty"; "of arbitrary size and shape"; "an arbitrary choice"; "arbitrary division of the group into halves" | |
| 5. | impulsive - characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic) archaicism, archaism - the use of an archaic expression incautious - lacking in caution; "an incautious remark"; "incautious talk" |