If he falls, then Cameron has lost an important ally and firewall.
I think that the firewall between depression and psychosis is going to be erased.
This is why people call South Carolina the “firewall” state for frontrunners.
He is my president, though, and he's the firewall we have against the lunatics taking over.
In effect, DOMA creates a kind of firewall, preventing the spread of same-marriage laws across state borders.
He went into the antechamber of the reactor and glared at the door in the firewall.
The temperature behind the firewall had risen to two-forty Centigrade.
"They're probably both stuck at the firewall," Willows said.
You try to get an experimental service running and no one will reconfigure the firewall.
He went over to the periscope that surveyed the part of the reactor beyond the firewall.
A means of separating a computer network from outside networks for security purposes. A server outside an organization's own network may be used to funnel all incoming and outgoing traffic to assist in keeping out viruses, as well as to prevent unauthorized outsiders from gaining access to a network.
[fr a firewall built to contain a fire in a building, a meaning found by 1851, and a barricade between an engine and a passenger compartment, found by 1947]