Emily Dickinson Lexicon

RET-I-RADE', n. [Fr. from retirer, to withdraw; Sp. retirada, a retreat.]

In fortification, a kind of retrenchment in the body of a bastion or other work, which is to be disputed inch by inch, after the defenses are dismantled. It usually consists of two faces, which make a re-entering angle. – Encyc.