Search Result for "psychosis": 
Wordnet 3.0

NOUN (1)

1. any severe mental disorder in which contact with reality is lost or highly distorted; 



The Collaborative International Dictionary of English v.0.48:

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]


WordNet (r) 3.0 (2006):

psychosis
    n 1: any severe mental disorder in which contact with reality is
         lost or highly distorted