Circumvallation

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Circumvallation \Cir`cum*val*la"tion\, n. (Mil.)
        (a) The act of surrounding with a wall or rampart.
        (b) A line of field works made around a besieged place and
            the besieging army, to protect the camp of the
            besiegers against the attack of an enemy from without.
            [1913 Webster]