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n.1.(Fort.) A low outwork before a bastion or ravelin, consisting of two lines of rampart parallel to the faces of the bastion, and protecting them from a breaching fire.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
(3) The reconstruction and the restoration of the Northern route's curtain walls, bulwarks, ravelins and counterguards is treated by the local authorities - for financial reasons - as a separate phase and was realized in 2012.