1. (

• collision ,
• hit ,

) (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" ;

2. (

• collision

) an accident resulting from violent impact of a moving object; "three passengers were killed in the collision"; "the collision of the two ships resulted in a serious oil spill" ;

3. (

• collision

) a conflict of opposed ideas or attitudes or goals; "a collision of interests" ;