suicidal

UK: /ˌsuːɪˈsaɪd^əl/ US: /ˌsuəˈsaɪdəl/ ,(so̅o̅′ə sīd′l)

WordReference Random House Learner's Dictionary of American English © 2026

su•i•cid•al /ˌsuəˈsaɪdəl/   adj. 

1. of or relating to suicide:
   his suicidal tendencies.
2. likely to bring disaster or ruin:
   politically suicidal acts.
See -cide-².

WordReference Random House Unabridged Dictionary of American English © 2026

su•i•cid•al  (so̅o̅′ə sīd′l), adj. 

1. Psychiatry pertaining to, involving, or suggesting suicide.
2. Psychiatry tending or leading to suicide.
3. foolishly or rashly dangerous:
   He drives at a suicidal speed.

• suicide + -al¹ 1770–80

su′i•cid′al•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

suicidal / ˌsuːɪˈsaɪd^əl ˌsjuː-/ adjective

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

ˌsuiˈcidally adverb