adjective.
Who focuses primarily on their own mind, feelings, or affairs.
noun.
One who focuses primarily on their own mind, feelings, or affairs.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
(psychology) a person who tends to shrink from social contacts and to become preoccupied with their own thoughts
verb.
fold inwards
verb.
turn inside
Word Usage
"A story in the online Atlantic Monthly on how to survive in the world as an introvert is one of the most-blogged stories of the day, according to Blogdex."