'extrovert' definitions:

Definition of 'extrovert'

adjective

Being concerned with the social and physical environment [syn: extrovert, extravert, extroverted, extraverted, extrovertive, extravertive]

noun

(psychology) a person concerned more with practical realities than with inner thoughts and feelings [syn: extrovert, extravert] [ant: introvert]

From: GCIDE

extrovert \extrovert\ n. (Psychol.) A person who is extroverted; a person who is marked by an interest in others or concerned primarily with external reality. Contrasted with introvert. [WordNet 1.5 +PJC] extroverted