Error (noun)

1. A mistake or an incorrect action or decision.
2. A deviation from accuracy or correctness.
3. A discrepancy between a computed, observed, or measured value or condition and the true, specified, or theoretically correct value or condition.

Origin:

From middle english error, from old french error, from latin error, from errare ("to wander, err").

Examples:

1. The error in the calculation was small.
2. He made an error in judgement.
3. There was an error in the program.
4. The error was corrected.
5. The error in the measurement was due to human error.