'Psychosis' definitions:

Definition of 'psychosis'

From: WordNet
noun
Any severe mental disorder in which contact with reality is lost or highly distorted

Definition of 'Psychosis'

From: GCIDE
  • Psychosis \Psy*cho"sis\, n. [NL. See Psycho-.] [1913 Webster]
  • 1. Any vital action or activity. --Mivart. [1913 Webster]
  • 2. (Med.) A disease of the mind; especially, a functional mental disorder, that is, one unattended with evident organic changes. [1913 Webster]

Synonyms of 'psychosis'

From: Moby Thesaurus