'Megalomania' definitions:
Definition of 'megalomania'
From: WordNet
noun
A psychological state characterized by delusions of grandeur
Definition of 'Megalomania'
From: GCIDE
- Megalomania \Meg`a*lo*ma"ni*a\, n. [NL., fr. megalo- + mania.] (Pathol.) A form of mental alienation in which the patient has grandiose delusions. [1913 Webster] megalomaniacal