- the act of colliding; a coming violently into contact; crash: the collision of two airplanes.
- a clash; conflict: a collision of purposes.
- the meeting of particles or of bodies in which each exerts a force upon the other, causing the exchange of energy or momentum.
- a violent impact of moving objects; crash
- the conflict of opposed ideas, wishes, attitudes, etc
- an event in which two or more bodies or particles come together with a resulting change of direction and, normally, energy
