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abnormal

B1
adjectivenoun

Pronunciation

UK

  • /əbnˈɔːməl/

US

  • /æbˈnɔrməl/

Description

Something abnormal deviates from what is considered typical or expected. It doesn't necessarily mean "bad," just different from the norm. A surprisingly warm day in December could be abnormal weather, just as an unusually quiet city street might suggest an abnormal situation. Doctors use "abnormal" to describe test results that fall outside the healthy range—it signals that something needs further investigation. Think of it as anything that doesn't quite fit the usual pattern.

The word comes from Latin roots meaning "away from the rule/standard," and it often shows up in technical contexts like medicine and logic. You might say a person's behavior is abnormal if they consistently act in ways that are unexpected or out of character. It can also describe physical characteristics—an abnormally large heart, for example. Be careful, though: "abnormal" isn't always negative; sometimes it just means unusually strong or striking, such as having abnormally sharp eyesight.

Examples

  1. 1

    Lab results

    The lab found abnormal cells in the sample.

  2. 2

    Medical warning

    If you notice any abnormal bleeding after surgery, call your doctor.

  3. 3

    Machine safety

    The machine shuts down automatically when the pressure reaches an abnormal level.

  4. 4

    Banking security

    The bank contacted me about some abnormal activity on my account.

    • Phrase

      abnormal activity

      unusual activity that may suggest fraud or another problem

  5. 5

    Behavior changes

    Her family became concerned when they noticed abnormal changes in her behavior.

  6. 6

    Mental health

    In the past, some people unfairly described mental illness as abnormal.

Forms and spellings

2 forms open this card.

Main spelling

  • abnormalnounadjective

Forms

  • abnormalspluralnounadjective