Pronunciation: (ri-pul'siv),[key] —adj. 1. causing repugnance or aversion: a repulsive mask. 2. capable of causing repulsion; serving to repulse: to present enough repulsive force to keep the enemy from daring to attack. 3. tending to drive away or keep at a distance; cold; forbidding: arrogant, repulsive airs to frighten the timid . 4. Physics.of the nature of or characterized by physical repulsion.