Source : Webster's Revised Unabridged Dictionary (1913)

Flagitious \Fla*gi"tious\, a. [L. flagitiosus, fr. flagitium a
   shameful or disgraceful act, orig., a burning desire, heat of
   passion, from flagitare to demand hotly, fiercely; cf.
   flagrare to burn, E. flagrant.]
   1. Disgracefully or shamefully criminal; grossly wicked;
      scandalous; shameful; -- said of acts, crimes, etc.

            Debauched principles and flagitious practices. --I.
                                                  Taylor.

   2. Guilty of enormous crimes; corrupt; profligate; -- said of
      persons. --Pope.

   3. Characterized by scandalous crimes or vices; as,
      flagitious times. --Pope.

   Syn: Atrocious; villainous; flagrant; heinous; corrupt;
        profligate; abandoned. See {Atrocious}. --
        {Fla*gi"tious*ly}, adv. -- {Fla*gi"tious*ness}, n.

              A sentence so flagitiously unjust.  --Macaulay.