Webster's Revised Unabridged Dictionary · 1913

Immunity

Immunity , noun

[Latin immunitas, from immunis free from a public service; pref. im- not + munis complaisant, obliging, compare munus service, duty: compare French immunité. See Common, and compare Mean, a.]

1.
Freedom or exemption from any charge, duty, obligation, office, tax, imposition, penalty, or service; a particular privilege; as, the immunities of the free cities of Germany; the immunities of the clergy.
2.
Freedom; exemption; as, immunity from error.
3.
The state of being insusceptible to disease, certain poisons, etc.