Source : Webster's Revised Unabridged Dictionary (1913)

Aventine \Av"en*tine\, a.
   Pertaining to Mons Aventinus, one of the seven hills on which
   Rome stood. --Bryant.

Aventine \Av"en*tine\, n.
   A post of security or defense. [Poetic]

         Into the castle's tower, The only Aventine that now is
         left him.                                --Beau. & Fl.