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sonic boom
son·ic boom (plural son·ic booms)


noun 
Definition:
 
loud boom from shock waves: a noise heard as a loud boom at ground level resulting from the shock waves created by an aircraft flying above the speed of sound
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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