Definition of accident | Bee Dictionary of English

n an unfortunate mishap; especially one causing damage or injury
n anything that happens suddenly or by chance without an apparent cause
winning the lottery was a happy accident
it was due to an accident or fortuity

What he found was that contrary to conventional wisdom, mandating the use of seat belts in 18 countries resulted in either no change or actually a net increase in road accident .
The accident and its aftermath, coming less than a decade after the near meltdown at Three Mile Island, also poisoned the world's attitude toward nuclear power.
PTI MAGAZINE September 1, 1986 WORLD ANATOMY OF A CATASTROPHE Moscow blames ''gross'' human error for the Chernobyl accident .

Accident slowing traffic on PA Turnpike
There is an accident slowing traffic on the PA Turnpike on the Susquehanna River Bridge. At this time, we don't know many details. Initial scanner reports said an accident happened near mile marker 245 involving a tractor trailer. Turnpike traffic operations center said the west bound lanes of the Turnpike on the bridge are closed for investigation and clean up. Check back here for more ...
June 16, 2013 - WHP CBS 21 Harrisburg
Accident shuts down I-85 South
The right lane on I-85 southbound closed near exit 179 due to an accident
June 16, 2013 - ABC11 Raleigh-Durham-Fayetteville
Accident shuts down 1-15 in Spanish Fork
An accident has shut down the freeway in Spanish Fork.
June 15, 2013 - Provo Daily Herald

Joe Barton in The Associated Press
BP should bear the full financial responsibility for the accident,he said, and "fully compensate those families and businesses that have been hurt by this accident."
Chet Culver in Allentown Morning Call
I am especially saddened because the accident occurred during the events celebrating Independence Day, which is a day that should be filled with pride and joy for all Iowans and Americans,Culver said.
Nelson Mandela in Tehran Times
Zenani Mandela, 13, was traveling in a car returning from the World Cup Kick-Off Concert at Orlando Stadium when the accident occurred,stated by the Mandela Foundation.