Source : Webster's Revised Unabridged Dictionary (1913)

Bulwark \Bul"wark\, v. t. [imp. & p. p. {Bulwarked}; p. pr. &
   vb.n. {Bulwarking}.]
   To fortify with, or as with, a rampart or wall; to secure by
   fortification; to protect.

         Of some proud city, bulwarked round and armed With
         rising towers.                           --Glover.