Definition of Barnes Wallis from the Oxford Advanced Learner's Dictionary

 

Barnes Wallis

 
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(1887-1979) an English engineer. He designed some of the most important aircraft and weapons of World War II, including the Wellington and Wellesley bombers (= planes that carry and drop bombs) and a 'bouncing' bomb used to destroy dams. After the war he invented the 'swing-wing' aircraft and helped to design Concorde. He was made a knight in 1968.