barrage balloon is a noun meaning "an elongated tethered balloon or blimp with cables or net suspended from it to deter enemy planes that are flying low". It carries one recorded sense.
an elongated tethered balloon or blimp with cables or net suspended from it to deter enemy planes that are flying low
Definitions, synonyms and semantic relations for barrage balloon come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.