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Borderline Personality Disorder (BPD)

Written by the Fiveable Content Team โ€ข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated September 2025

Definition

A mental health disorder characterized by unstable moods, behavior, self-image which impacts relationships, self-image, behavior and functioning.

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Borderline Personality Disorder (BPD) Definition - AP Psychology Key Term | Fiveable