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airspeed

[air-speed] /ˈɛərˌspid/
noun
1.
the forward speed of an aircraft relative to the air through which it moves.
Also, air speed.
Compare groundspeed.
Origin
1905-1910
1905-10; air1 + speed
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for air speed

airspeed

/ˈɛəˌspiːd/
noun
1.
the speed of an aircraft relative to the air in which it moves Compare groundspeed
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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