This is the 3047th most frequent Russian word.
зенитной
"Zenitnoy" translates to "anti-aircraft" in English.
Зенитной: Used as an adjective describing 'батарее', meaning pertaining to anti-aircraft, showing it operates against high altitude targets.
Зенитной батарее вдоль побережья дали приказ.
The anti-aircraft battery along the coast was given an order.
Зенитной: Modifies 'установки', indicating that the installation serves the purpose of combating aerial threats.
Офицер проверил зенитной установки на фронте.
The officer inspected the anti-aircraft installation at the front.
Зенитной: Describes 'техники', specifying that the equipment repaired is for anti-air defense purposes.