'Contravallation' definitions:

Definition of 'Contravallation'

From: GCIDE
  • Contravallation \Con`tra*val*la"tion\, n. [Pref. contra- + vallation: cf. F. contrevallation. Cf. Countervallation.] (Fort.) A trench guarded with a parapet, constructed by besiegers, to secure themselves and check sallies of the besieged. [1913 Webster]