Webster
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Webster’s Revised Unabridged Dictionary · 1913

Bastion

Bas′tion (băs′chŭn; 106), n. [F. bastion (cf. It. bastione), fr. LL. bastire to build (cf. F. bâtir, It. bastire), perh. from the idea of support for a weight, and akin to Gr. βαστάζειν to lift, carry, and to E. baston, baton.] (Fort.) A work projecting outward from the main inclosure of a fortification, consisting of two faces and two flanks, and so constructed that it is able to defend by a flanking fire the adjacent curtain, or wall which extends from one bastion to another. Two adjacent bastions are connected by the curtain, which joins the flank of one with the adjacent flank of the other. The distance between the flanks of a bastion is called the gorge. A lunette is a detached bastion. See Ravelin.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.