1. A discrepancy between a computed, observed, or measured value or condition and the true, specified, or theoretically correct value or condition.
2. <programming> A mental mistake made by a programmer that may result in a program fault.
3. (verb) What a program does when it stops as result of a programming error.
Try this search on Wikipedia, OneLook, Google
Nearby terms: ERM « erotica « ERP « error » error-based testing » error correcting memory » error detection and correction