1. Protected from getting a disease because of natural resistance, resistance acquired after catching the disease, or resistance conferred by inoculation.
2. Relating to or involved in a body's resistance to disease or the creation of this resistance.
3. Exempt from something that others are subject to or made to endure or to perform; such as, immune from prosecution.
4. Not sensitive or susceptible to something: "She was immune to flattery."
5. Etymology: from Latin immunis, "exempt from public service", from munis, "ready for service".