the world > action or operation > safety > protection or defence > protect or defend [verb (transitive)] > furnish with specific protective device or substance (4)
transitive. To furnish (something) with a bastion or bastions (bastion, n. 2). Obsolete. rare.
To pad or protect as with cushions. Also figurative.
transitive. U.S. To fit (a building) with lightning conductors (cf. lightning rod, n. 1). Now rare.
transitive. In passive. To be equipped with a gas mask. Now rare.