(uncountable) The state of being uncivil; lack of courtesy; rudeness in manner. / (countable) Any act of rudeness or ill-breeding. / (uncountable) Lack of civilization; a state of rudeness or barbarism.

(rare) Displaying a lack of courtesy; rude, impolite. / (rare) Uncivilized, barbarous.

The state of being uncivilized; barbarism.

plural of incivility