Definition of Raytheon from the Oxford Advanced Learner's Dictionary

 

Raytheon

 
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a large US company started in 1922 and based in Waltham, Massachusetts. It specializes in areas such as computing, technology and engineering but is particularly known for the advanced weapons it produces, especially missiles (= weapons that are sent through the air and explode when they hit their target). Most of the equipment Raytheon produces is sold to the US government.