Source : Webster's Revised Unabridged Dictionary (1913)

Sanguinary \San"gui*na*ry\, a. [L. sanguinarius, fr. sanguis
   blood: cf. F. sanguinaire.]
   1. Attended with much bloodshed; bloody; murderous; as, a
      sanguinary war, contest, or battle.

            We may not propagate religion by wars, or by
            sanguinary persecutions to force consciences.
                                                  --Bacon.

   2. Bloodthirsty; cruel; eager to shed blood.

            Passion . . . makes us brutal and sanguinary.
                                                  --Broome.

   Syn: Bloody; murderous; bloodthirsty; cruel.

Sanguinary \San"gui*na*ry\, n. [L. herba sanguinaria an herb
   that stanches blood: cf. F. sanguinaire. See {Sanguinary},
   a.] (Bot.)
      (a) The yarrow.
      (b) The Sanguinaria.

Source : WordNet®

sanguinary
     adj 1: accompanied by bloodshed; "this bitter and sanguinary war"
            [syn: {gory}, {sanguineous}, {slaughterous}, {butcherly}]
     2: marked by eagerness to resort to violence and bloodshed;
        "bloody-minded tyrants"; "bloodthirsty yells"; "went after
        the collaborators with a sanguinary fury that drenched the
        land with blood"-G.W.Johnson [syn: {bloodthirsty}, {bloody-minded}]