Look up: Contravallation

1. Contravallation
   Con`tra·val·la'tion noun [ Prefix contra- + vallation : confer French contrevallation . Confer Countervallation .] (Fort.) A trench guarded with a parapet, constructed by besiegers, to secure themselves and check sallies of the besieged.
   Found on http://www.encyclo.co.uk/webster/C/150
   
   
2. Contravallation
   • (n.) A trench guarded with a parapet, constructed by besiegers, to secure themselves and check sallies of the besieged.
   Found on http://thinkexist.com/dictionary/meaning
   
   
3. contravallation
   contravallation A more or less continuous chain of redoubts and breastworks raised by besiegers outside the line of circumvallation of a besieged place to protect the besiegers from attacks from the outside, as by a relieving force.
   Found on http://www.wordinfo.info/words/index/inf
   
   
4. Contravallation
   In fortifications a contravallation was a trench guarded with a parapet, constructed by besiegers, to secure themselves and check sallies of the besieged.
   Found on http://www.probertencyclopaedia.com/brow