noun
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.
(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)
Any chance event.
(uncountable) Chance; random chance.
Any property, fact, or relation that is the result of chance or is nonessential or nonsubstantive.
(euphemistic) An instance of incontinence.
(euphemistic) An unintended pregnancy.
(geology) An irregular surface feature with no apparent cause.
(geology) A sudden discontinuity of ground such as fault of great thickness, bed or lentil of unstable ground.
(heraldry) A point or mark which may be retained or omitted in a coat of arms.
adjective
(transport) Designating any form of transportation involved in an accident.