introversion
n. orientation toward the internal private world of one’s self and one’s inner thoughts and feelings, rather than toward the outer world of people and things. Introversion is a broad personality trait and, like extraversion, exists on a continuum of attitudes and behaviors. Introverts are relatively more withdrawn, retiring, reserved, quiet, and deliberate; they may tend to mute or guard expression of positive affect, adopt more skeptical views or positions, and prefer to work independently. [concept originated by Carl Jung for the study of personality types]
—introversive
adj.
—introvert
n.
—introverted
adj.