borderline personality disorder

noun
  1. psychiatry a mental condition on the dividing line between a psychiatric disorder and normality characterized by impulsiveness, extreme mood swings, and often aggressiveness
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borderline personality disorder in Medicine

borderline personality disorder

[bôrdər-līn′]
n.
  1. A personality disorder marked by a long-standing pattern of instability in interpersonal relationships, behavior, mood, and self-image that can interfere with social or occupational functioning or cause extreme emotional distress.
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