Incivility, n.; pl. Incivilities.
Etymology: [L. incivilitas: cf. F. incivilité.]
1. The quality or state of being uncivil; want of courtesy; rudeness of manner; impoliteness. Shak. Tillotson.
2. Any act of rudeness or ill breeding. Uncomely jests, loud talking and jeering, which, in civil account, are called indecencies and incivilities. Jer. Taylor.
3. Want of civilization; a state of rudeness or barbarism. [R.] Sir W. Raleigh.
Syn. -- Impoliteness; uncourteousness; unmannerliness; disrespect; rudeness; discourtesy.
Shades of meaning
Fernald has no entry of its own for incivility; he lists it under impudence.
He lists it without comment; the entries above explain its neighbors.