Looking for the meaning or definition of the word hornwork? Here's what it means.
Noun
A type of fortification consisting of a pair of demi-bastions with a curtain wall connecting them and with two long sides directed upon the faces of the bastions, or ravelins of the inner fortifications, so as to be defended by them.
Examples
Of geometry he learned as much as was necessary for the construction of a ravelin or a hornwork.