- Portugal
- Postnatal/Postpartum Depression
- Pƶtzl, Otto (1877-1962)
- Preconception
- Preconscious, The
- Pregenital
- Pregnancy, Fantasy of
- Prehistory
- Premature-Prematurity
- Premonitory Dreams
- Prepsychosis
- Prereflective Unconscious
- Primal Fantasies
- Primal Repression
- Primal Scene
- Primal, The
- Primary Identification
- Primary Love
- Primary Masochism
- Primary Need
- Primary Object
- Primary Process/Secondary Process
- Primitive
- Primitive Agony
- Primitive Horde
- Principle of Constancy
- Principle of Identity Preservation
- Principle of (Neuronal) Inertia
- Principles of Mental Functioning
- Privation
