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Meaning of Superfortress

Su•per•for•tress

Pronunciation: (s'pur-fôr"tris), [key]
— n. U.S. Mil.
  1. a heavy, long-range, four-engined bomber used during World War II. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.