running in

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running in

noun

uncountable The operating of a new engine (especially that of a motor vehicle) at less than its normal speed until proper working has been established. For years past Pacific locomotives of all classes have worked between Kings Cross and Cambridge, […] both in order usefully to fill in gaps in their long-distance rosters, and also for running-in purposes after overhaul. Before the war the 7.18 a.m. slow from Kings Cross to Cambridge was a regular r

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noun operation of a new engine for testing

Español	rodaje
Français	rodage
Italiano	rodaggio
Română	rodaj

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MLA

"running in." Wiktionary, via Micwyn, micwyn.com/word/running%20in. Accessed 6 Nov. 2026.

APA

running in. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/running%20in

Chicago

"running in." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/running%20in.

BibTeX

@misc{running_in_2026,
  title = {running in},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/running%20in},
  urldate = {2026-11-06}
}