Definitions for "Barrage balloon"
Tethered balloon attached to cables or net, designed to deter low-flying air attacks. Used to protect London from German bombing raids during the First World War.
an elongated tethered balloon or blimp with cables or net suspended from it to deter enemy planes that are flying low
a captive balloon, of tear-drop shape and with fins to keep it headed into the wind, which can be positioned around likely bombing targets to interfere with the probable flight paths of enemy aircraft