noun
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the act of directing one's interest outward or to things outside the self; extroversion.
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the state of being concerned primarily with things outside the self, with the external environment rather than with one's own thoughts and feelings; extroversion.
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(psych.) a person characterised by extroversion; a person concerned primarily with the physical and social environment (opp. to introvert); an introvert.
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(phil.) a man not concerned about the self, inner development, etc.