Narcissism Glossary

Narcissistic Personality Disorder (NPD)

🩺 Narcissistic personality disorder (NPD) is a formal diagnosis made by a psychiatrist under DSM-5-TR criteria, weighing long-standing behavior patterns together with difficulties across daily life.

Neither this glossary nor any online checklist can determine whether you or anyone else has NPD.

Often seen in situations like these

You'll find posts declaring someone NPD merely for never apologizing. In practice, a clinician weighs far more information than any online checklist holds.

When this happens, try this

💡 Rather than guessing their diagnosis, write down the words and behavior you experienced. Your safety and boundaries can be protected regardless of whether any diagnosis exists.

Type formal diagnosis · Topic Narcissism-adjacent terms · Also known as Narcissistic Personality Disorder (NPD)

Official sources & review information

Standard/jurisdiction DSM-5-TR · Last reviewed 2026.08.14

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