Source : Webster's Revised Unabridged Dictionary (1913)

Factious \Fac"tious\ a. [L. factiosus: cf. F. factieux.]
   1. Given to faction; addicted to form parties and raise
      dissensions, in opposition to government or the common
      good; turbulent; seditious; prone to clamor against public
      measures or men; -- said of persons.

            Factious for the house of Lancaster.  --Shak.

   2. Pertaining to faction; proceeding from faction;
      indicating, or characterized by, faction; -- said of acts
      or expressions; as, factious quarrels.

            Headlong zeal or factious fury.       --Burke.
      -- {Fac"tious*ly}, adv. -- {Fac"tious-ness}, n.