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derailment

American  
[dee-reyl-muhnt] / diˈreɪl mənt /

noun

  1. the act or process of derailing.

  2. Psychiatry. loosening of associations.

Etymology

Origin of derailment

1940–45; derail + -ment, or < French déraillement

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.