<p><strong>Noun</strong></p><ul><li>the act of colliding; a coming violently into contact; crash: the collision of two airplanes.</li><li>a clash; conflict: a collision of purposes.</li><li>Physics. the meeting of particles or of bodies in which each exerts a force upon the other, causing the exchange of energy or momentum.</li></ul><p><strong>End of Response</strong></p>