Also found in: Idioms.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
an industrial term for the preparatory testing and operation of railroad rolling stock, automobiles, lathes, and other machines after their manufacture or repair. Running in is performed in order to raise the machines to specified standards.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.