The phrase "aerial defense" is correct and usable in written English.
It can be used in contexts related to military strategy, air security, or protection against aerial attacks.
Example: "The country has invested heavily in its aerial defense systems to protect against potential threats from the sky."
Alternatives: "air defense" or "aviation defense".
"This is very difficult and painful for all of us," said Gen. Gustavo Romero, commander of aerial defense.
If the plant had been built away from a military installation, he said, Iran would have had to invest in a separate aerial defense system to protect it.
Then of course there is the average mil-spec aerial defense.
Following the armistice on 22 June I./JG 76 was moved to Eindhoven and Schipol where they were tasked with the aerial defense of the Netherlands.
The Israeli military said 12 targets, including three aerial defense batteries and four Iranian targets that are part of Iran's military establishment in Syria were attacked.
She commanded a fleet of ships with which she demanded tribute from surrounding lands, and she kept an aerial defense force of griffins, fabulous animals which were native to California, trained to kill any man they found.
It took an air war against a foe with minimal aerial defenses to bring the US air force's most advanced warplane into combat.
One was a rocket-propelled aerial-defense system.
That eventually led to the development of lidar sensors that were first used for commercial aerial mapping and defense applications.
Antiaircraft gun, artillery piece that is fired from the ground or shipboard in defense against aerial attack.
George Carlin once poked fun at football's martial tone: The object is for the quarterback, also known as the field general, to be on target with his aerial assault, riddling the defense by hitting his receivers with deadly accuracy in spite of the blitz, even if he has to use shotgun.
