Definition of: introvert

(in′trə·vûrt) noun
1. Psychol. An individual with strongly self–centered patterns of emotion, fantasy, and thought: opposed to extrovert.
2. Biol. An organ capable of being turned inward, as the eye tentacle of a land snail or the proboscis of a gastropod.
—v.t.
1. To turn within; cause to take an inward direction, as the mind or one's thoughts.
2. Biol. To turn (an organ) inward upon itself.
—adjective Characterized by or tending to introversion: introvert habits. [<INTRO- + L vertere turn]