Do you really want to send Webster 1913 a message saying you like their work?
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.
© Webster 1913.