| noun | (physics) a 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” |
| noun | an accident resulting from violent impact of a moving object “three passengers were killed in the collision” |
| noun | a conflict of opposed ideas or attitudes or goals “a collision of interests” |
| collide | verb | crash together with violent impact |
| hit | verb | hit against; come into sudden contact with |