barrage balloon


noun

a balloon or blimp, usually one of several anchored around a military area, city, etc., from which wires or nets are hung as a protection against attacks from low-flying aircraft.

Origin of barrage balloon

First recorded in 1920–25

British Dictionary definitions for barrage balloon

barrage balloon

noun

one of a number of tethered balloons with cables or net suspended from them, used to deter low-flying air attack