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  1. DISORDER Definition & Meaning - Merriam-Webster

    The meaning of DISORDER is to disturb the order of. How to use disorder in a sentence.

  2. Disorder - Wikipedia

    Mental disorder or psychological disorder, a psychological pattern associated with distress or disability that occurs in a person and is not a part of normal development or culture:

  3. DISORDER Definition & Meaning | Dictionary.com

    DISORDER definition: lack of order or regular arrangement; confusion. See examples of disorder used in a sentence.

  4. Mental Disorders: Types, Causes & Symptoms - Cleveland Clinic

    There are many different types of mental disorders, like anxiety, depression and schizophrenia. A mental health disorder, also known as a mental illness or psychiatric disorder, is a condition that affects the …

  5. DISORDER | definition in the Cambridge English Dictionary

    DISORDER meaning: 1. a state of untidiness or lack of organization: 2. an illness of the mind or body: 3. an angry…. Learn more.

  6. Disorder - definition of disorder by The Free Dictionary

    1. A lack of order or regular arrangement; confusion. 2. A breach of civic order or peace; a public disturbance. 3. A condition characterized by lack of normal functioning of physical or mental …

  7. Disorder - Definition, Meaning & Synonyms | Vocabulary.com

    Disorder is a lack of order — in other words, chaos, clutter, and general disarray. If everyone in your class is yelling and throwing things, there's no order: there's disorder.

  8. Disruptive Mood Dysregulation Disorder: The Basics - NIMH

    Information about disruptive mood dysregulation disorder, including a what it is, signs and symptoms, diagnosis, treatment, and tips for parents and caregivers.

  9. Mental disorders - World Health Organization (WHO)

    Sep 30, 2025 · A mental disorder is characterized by a clinically significant disturbance in an individual’s cognition, emotional regulation, or behaviour. It is usually associated with distress or impairment in …

  10. Mental illness - Symptoms and causes - Mayo Clinic

    Dec 13, 2022 · Signs and symptoms of mental illness can vary, depending on the disorder, circumstances and other factors. Mental illness symptoms can affect emotions, thoughts and behaviors.