The Collaborative International Dictionary
Seditiousness
Seditious \Se*di"tious\, a.[L. seditiosus: cf. F. s['e]ditieux.]
Of or pertaining to sedition; partaking of the nature of, or tending to excite, sedition; as, seditious behavior; seditious strife; seditious words.
Disposed to arouse, or take part in, violent opposition to lawful authority; turbulent; factious; guilty of sedition; as, seditious citizens. [1913 Webster] -- Se*di"tious*ly, adv. -- Se*di"tious*ness, n.
Wiktionary
seditiousness
n. The quality of being seditious.