an unfortunate incident that happens unexpectedly and unintentionally, typically resulting in damage or injury
he had an accident at the factory
if you are unable to work owing to accident or sickness
an event that happens by chance or that is without apparent or deliberate cause
the pregnancy was an accident
it is no accident that Manchester has produced more than its fair share of professional comics
(in Aristotelian thought) a property of a thing which is not essential to its nature