repercussionn.[L. repercussio: cf. F. rpercussion.]1. The act of driving back, or the state of being driven back; reflection; reverberation; as, the repercussion of sound.()Ever echoing back in endless repercussion. (Hare.)2. (Mus.) Rapid reiteration of the same sound.()3. (Med.) The subsidence of a tumor or eruption by the action of a repellent.(Dunglison.)4. (Obstetrics) In a vaginal examination, the act of imparting through the uterine wall with the finger a shock to the fetus, so that it bounds upward, and falls back again against the examining finger.()