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er·ror

/ˈerər/
noun
noun: error; plural noun: errors

A mistake.
"spelling errors"
synonyms: mistake, inaccuracy, miscalculation, blunder, oversight; More

The state or condition of being wrong in conduct or judgment.
"the money had been paid in error"
synonyms: wrongly, by mistake, mistakenly, incorrectly; More

BASEBALL
A misplay by a fielder that allows a batter to reach base or a runner to advance.

technical
A measure of the estimated difference between the observed or calculated value of a quantity and its true value.

LAW
A mistake of fact or of law in a court's opinion, judgment or order.
"the decisions of the appeal committee disclosed no error of law"