- 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. 2018
- 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