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air dam

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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.
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Origin of air dam

First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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
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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