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See more synonyms for suicidal on Thesaurus.com
  1. pertaining to, involving, or suggesting suicide.
  2. tending or leading to suicide.
  3. foolishly or rashly dangerous: He drives at a suicidal speed.
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Origin of suicidal

First recorded in 1770–80; suicide + -al1
Related formssu·i·cid·al·ly, adverbpseu·do·su·i·ci·dal, adjectiveun·su·i·cid·al, adjectiveun·su·i·cid·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for suicidal

Contemporary Examples

Historical Examples

  • This was the feeling which forbad him to retreat from his suicidal purpose.

    Kept in the Dark

    Anthony Trollope

  • Do not rail against the designs of Providence; it would be suicidal.

  • It would be suicidal for the two men now to attempt to do anything to free them.

    The Cave of Gold

    Everett McNeil

  • Exposure, wet feet, were as suicidal in her condition as poison, he had told her.

  • I found Tony, the suicidal Greek, steering this morning when I came on deck.

British Dictionary definitions for suicidal


  1. involving, indicating, or tending towards suicide
  2. liable to result in suicidea suicidal attempt
  3. liable to destroy one's own interests or prospects; dangerously rash
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Derived Formssuicidally, adverb
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

Word Origin and History for suicidal


1777, from suicide + -al (1). Related: Suicidally.

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Online Etymology Dictionary, © 2010 Douglas Harper

suicidal in Medicine


  1. Of or relating to suicide.
  2. Likely to attempt suicide.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.