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disloyal

American  
[dis-loi-uhl] / dɪsˈlɔɪ əl /

adjective

  1. false to one's obligations or allegiances; not loyal; faithless; treacherous.

    Synonyms:
    treasonable, traitorous, perfidious, unfaithful
disloyal British  
/ dɪsˈlɔɪəl /

adjective

  1. not loyal or faithful; deserting one's allegiance or duty

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • disloyalist noun
  • disloyally adverb

Etymology

Origin of disloyal

1470–80; < Middle French desloial, Old French desleal, equivalent to des- dis- 1 + leal loyal

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.