an undesirable or unfortunate happening that occurs unintentionally and usually results in harm, injury, damage, or loss; casualty; mishap: automobile accidents.
2.
Law. such a happening resulting in injury that is in no way the fault of the injured person for whichcompensation or indemnity is legally sought.
3.
any event that happens unexpectedly, without a deliberate plan or cause.
4.
chance; fortune; luck: I was there by accident.
5.
a fortuitous circumstance, quality, or characteristic: an accident of birth.
Origin: 1350–1400; Middle English < Latin accident- (stem of accidēns happening, present participle of accidere to befall), equivalent to ac-ac- + -cid-, combining form of cad- fall + -ent--ent
late 14c., "an occurrence, incident, event," from O.Fr. accident (12c.), from L. accidentum (nom. accidens, gen. accidentis), prp. of accidere "happen, fall out, fall upon," from ad- "to" + cadere "fall" (see case (1)). Meaning grew from "something that happens, an event,"