(n.) 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
| APA | Webster's. (2011). bastion. Retrieved September 22, 2026, from http://smartdefine.org/bastion/definitions/1978640 |
| Chicago | Webster's. 2011. "bastion" http://smartdefine.org/bastion/definitions/1978640 (accessed September 22, 2026). |
| Harvard | Webster's 2011, bastion, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/bastion/definitions/1978640>. |
| MLA | Webster's. "bastion" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/bastion/definitions/1978640> |