an especially hard, heat-resistant steel for use in lathe tools and for other applications involving high friction and wear.
Origin of high-speed steel
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of various steels that retain their hardness at high temperatures and are thus suitable for making tools used on lathes and other high-speed machines
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