collisionn.[L. collisio, fr. collidere. See Collide.]1. The act of striking together; a striking together, as of two hard bodies; a violent meeting, as of railroad trains; a clashing.()2. A state of opposition; antagonism; interference.()The collision of contrary false principles. (Bp. Warburton.)Sensitive to the most trifling collisions. (W. Irving.)()