Quick definitions from WordNet (collision)
▸ noun: a conflict of opposed ideas or attitudes or goals ("A collision of interests")
▸ noun: an accident resulting from violent impact of a moving object ("Three passengers were killed in the collision")
▸ noun: (physics) an brief event in which two or more bodies come together ("The collision of the particles resulted in an exchange of energy and a change of direction")
▸ Also see collision
▸ noun: a conflict of opposed ideas or attitudes or goals ("A collision of interests")
▸ noun: an accident resulting from violent impact of a moving object ("Three passengers were killed in the collision")
▸ noun: (physics) an brief event in which two or more bodies come together ("The collision of the particles resulted in an exchange of energy and a change of direction")
▸ Also see collision