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abnormal

/əbˈnɔɹ.ml̩/ · ab·nor·mal
noun
  1. A person or object that is not normal. The doctor diagnosed the patient as having an abnormal heart rate.
adjective
  1. Not conforming to rule or system; deviating from the usual or normal type. The abnormal weather patterns caused widespread flooding in the region.
  2. Of or pertaining to that which is irregular, in particular, behaviour that deviates from norms of social propriety or accepted standards of mental health. The psychologist studied the abnormal behavior of the patient, trying to identify the underlying causes.
Did you know? The term 'abnormal' has been used in various fields, including psychology, medicine, and physics, to describe phenomena that deviate from the expected or typical behavior.
Written by Lexi Wordsworth, Dictionary Editor 2 lookups Added Jul 25, 2026