Meaning of “suicidal” in the English Dictionary

"suicidal" in British English

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uk /ˌsuː.ɪˈsaɪ.dəl/ us /ˌsuː.əˈsaɪ.dəl/

suicidal adjective (DEATH)

People who are suicidal want to kill themselves or are in a mental state in which it is likely that they will try to do so:

Pete was so depressed after his girlfriend left him that I actually thought he was suicidal.

Suicidal behaviour is likely to result in death:

He took some suicidal risks.
adverb uk /ˌsuː.ɪˈsaɪ.dəl.i/ us /ˌsuː.əˈsaɪ.dəl.i/

(Definition of “suicidal” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"suicidal" in American English

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us /ˌsu·əˈsɑɪ·dəl/

having the tendency to want to kill yourself

Suicidal also means likely to cause your own defeat:

The union leader argued that a strike now would be suicidal.

(Definition of “suicidal” from the Cambridge Academic Content Dictionary © Cambridge University Press)