a deviation from what is correct or specified by standard
the difference between an observed or calculated value and the theoretical correct value, especially resulting from variations in measurement
Computinga failure of software or hardware that produces an incorrect result or a failure in the system
Lawa mistake in a court's opinion, judgment, or order
Error1 includes poor judgment in a decision or the belief that something false is true or the converse.
Error2, 3 is generally relative. The degree to which something deviates from a standard or theoretical value is measured in terms of its accuracy. The ability of a system to measure the difference depends on the precision of the system.