lay siege verb2 •Chiefly followed by against or to: to engage in a siege; to besiege.And lay siege against it, and build a fort against it, and cast a mount against it; set the camp also against it, and set battering rams against it round about. — 1611 •(figurative) To attack continually over a long period.They’re laying siege to all we hold dear. formslaid siege · laying siege · lays siege