Meaning

noun (psychology) a person concerned more with practical realities than with inner thoughts and feelings

adjective being concerned with the social and physical environment

originAs a verb, from New Latin extrāvertō, from Classical Latin extrā- (“outside”) + vertō (“to turn”). As a noun and adjective, a back-formation from extraversion. Popularized in psychology by translations of German works by Carl Jung. By surface analysis, extra- + -vert.

Etymology from Wiktionary, CC BY-SA 3.0