n.
Pronunciation: ˌ pr ē -myu ̇ - ' ni-sh ə n
Function: noun
Etymology: Latin praemunition-, praemunitio strengthening of an argument to forestall objections, from praemunire to fortify in advance, from prae- + munire to fortify ― more at MUNITION
Date: 1607
1 archaic : an advance provision of protection
2 a : resistance to a disease due to the existence of its causative agent in a state of physiological equilibrium in the host b : immunity to a particular infection due to previous presence of the causative agent