The act of impelling or driving onward, or the state of being impelled; the sudden or momentary agency of a body in motion on another body; also, the impelling force, or impulse.

Without prior consideration; spontaneously, impulsively

plural of impulsion

simple past tense and past participle of impulse

present participle of impulse

plural of impulsivity

Speech that concentrates on the speaker's thoughts and intentions, disregarding an interruption by the listener.

plural of impulsive speech

(physiology) The signal transmitted along a nerve fibre, either in response to a stimulus (such as touch, pain or heat), or as an instruction (such as causing a muscle to contract).

The act of making unplanned or otherwise spontaneous purchases.