superfortress noun2 •A massive and heavily protected fortress. •A bomber aeroplane that is larger than and superior to by being technically advanced compared to the Boeing B-17 "flying fortress", specifically the Boeing B-29 long-range heavy bomber aeroplane that was developed during the early 1940s.These women flew fighter planes and B-29 superfortresses as test pilots as well as ferry pilots. — 1979 formssuperfortresses
