IPA: /ˌɛkstrəˈvɜrʒən/
KK: /ɛkstrəˈvɜrʒən/
The quality of being outgoing and focused on the external world rather than one's inner thoughts and feelings.
Her extroversion made her the life of the party, as she easily engaged with everyone around her.
Extroversion is formed from "extro-" (meaning outside) and "versio" (from "vertere", meaning to turn). The word describes a personality trait characterized by turning outward towards the external world, focusing on social interactions and external stimuli.
Think of 'turning outside' ('extro-') to remember that 'extroversion' means being focused on the external world and social interactions.