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air dam

noun, Automotive.
1.
a spoiler mounted at the front of an automobile to reduce air flow on the underside of the chassis to increase stability.
Origin
1970-1975
1970-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for air dam

air dam

noun
1.
any device, such as a spoiler, that reduces air resistance and increases the stability of a car, aircraft, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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