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after-run

American  
[af-ter-ruhn, ahf-] / ˈæf tərˌrʌn, ˈɑf- /

noun

  1. the continued running of an internal-combustion engine after the ignition is switched off.

    Heavy carbon buildup can cause annoying engine after-run.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.