Definition of accidents:
(n) :
An unexpected event with negative consequences occurring without the intention of the one suffering the consequences, and (in the strict sense) not directly caused by humans.
(n) :
(transport) A collision or crash of a vehicle, aircraft, or other form of transportation that causes damage to the transportation involved; and sometimes injury or death to the transportation's occupants or bystanders in close proximity. (but see Usage notes)
(n) :
(law) casus; such unforeseen, extraordinary, extraneous interference as is out of the range of ordinary calculation.
(n) :
Any chance event.
(n) :
(uncountable) Chance; random chance.
(n) :
Any property, fact, or relation that is the result of chance or is nonessential or nonsubstantive.