The definition of an accident is an event that happens without being planned.
(noun)See accident in Webster's New World College Dictionary
noun
Origin: ME < OFr < L accidens, prp. of accidere, to fall upon, happen < ad-, to + cadere, to fall: see case
See accident in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English, chance event
Origin: , from Old French
Origin: , from Latin accidēns, accident-
Origin: , present participle of accidere, to happen
Origin: : ad-, ad-
Origin: + cadere, to fall; see kad- in Indo-European roots
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