What does 'integrity' mean?

Integrity means:

1. Strict adherence to a moral code, reflected in transparent honesty and complete harmony in what one thinks, says, and does.

2. State of a system where it is performing its intended functions without being degraded or impaired by changes or disruptions in its internal or external environments.

3. Stored or transmitted data that is free from any unauthorized change.

Integrity means holding to a strict moral code and not stealing, cheating, lying and so on. eg

honesty; having morals