n. Concern with or an orientation toward others or what is outside oneself; behavior expressing such an orientation; the definitive characteristic of an extrovert.
n. The condition of being extrorse, or turned wrong side out.
the GNU version of the Collaborative International Dictionary of English
n. The condition of being turned wrong side out.
n. the trait of being interested primarily in things in one's external environement, rather than one's own thoughts and feelings.
n. the act of directing one's interests primarily toward things in one's external environement, rather than one's own thoughts and feelings.
The Century Dictionary and Cyclopedia
n. In pathology, a turning inside out, as of the eyelids (see eversion) or of the bladder—in the latter case, a congenital malformation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. (psychology) an extroverted disposition; concern with what is outside the self
Word Usage
"Even if a genetic variant seems to cause a particular behavior — such as extroversion or verbal fluency — in one environment, it may have no effect, or the opposite effect, in a different environment."