ENGLISH
REFERENCE

suicidal

adj. · n.
US //ˌsuəˈsaɪdəɫ// UK //sˌuːɪsˈaɪdəl// sui·ci·dal
  1. 1 wanting to end one's life (adj.)
    B2 Upper Intermediate Medicine

    feeling so unhappy or hopeless that you want to kill yourself.

    relating to or likely to commit suicide; describing a person experiencing a mental health crisis involving self-harm ideation.

    Example

    The doctor was very concerned because the patient felt suicidal after losing his job.

    Example

    Medical professionals are trained to identify suicidal ideation in patients who may not explicitly state their intention to harm themselves.

    Usage

    Often used with the verb 'feel' or 'be'.

    • despairing
    • self destructive
  2. 2 extremely dangerous or reckless (adj.)
    C1 Advanced Informal

    describing an action that is so risky it will probably lead to death or a complete disaster.

    describing a course of action that is likely to result in the death of the participants or the total destruction of an enterprise.

    Example

    Driving that fast on these icy roads is absolutely suicidal.

    Example

    The general argued that a frontal assault on such a heavily fortified position would be suicidal for the infantry.

    Teacher's tip

    In informal contexts, this is used as a strong hyperbole for any very risky decision, not just physical danger.

Show 1 more senseShow fewer
  1. 3 a person at risk (n.)
    C2 Proficiency Formal

    a person who is likely to try to kill themselves.

    an individual who is likely to commit or attempt to commit suicide.

    Example

    The clinic provides a safe space and 24-hour care for potential suicidals.

    Example

    The study followed a group of known suicidals to determine which intervention methods were most effective at preventing self-harm.

    Usage

    This noun use is less common than the adjective and can sound clinical or dated.

Origin

From suicide + -al.

© 2026 English Reference