As a Noun: 1. The fact of two moving objects, especially cars, hitting each other. English = collision. 2. An event that happens by chance or unintentionally, when a car hits something or another moving car. English = accident, car accident, smash, crash. As a Verb or Adjective: 1. Of two moving objects, especially cars, to hit into each other. English = collide. 2. Of a car, to hit something or another moving car by chance or unintentionally. English = crash, smash, have an accident.