(psychiatry) A personality disorder characterized largely by an overinflated sense of self-importance typically caused by unbalanced parental valuation during childhood.

(psychology) A personality disorder characterized largely by exaggerated emotions, and inappropriate attention-seeking and seductive behavior typically caused by undue amounts of trauma and related stress during childhood.

(medicine) A rare neurological disorder characterized by progressive rigidity and stiffness, primarily of the axial musculature, resulting in postural deformities.

plural of absolute personal equation

The difference between an observed value and a standard value assumed as true.

Alternative form of personal defense weapon

plural of personal defense weapon

plural of personal defence weapon

a compact fully-automatic or semi-automatic firearm similar to a submachine gun but firing a rifle round

A number used to confirm an individual's identity, e.g. when using an ATM or a mobile phone, or when making payment using a credit card or debit card.