1. adjective
a) Comfortable in social settings and interactions; confident in dealing with people especially in meeting new people; gregarious.
Tom is very outgoing and enjoys meeting people; his brother, on the other hand, is painfully shy.
b) Going out, on its way out.
Quieter parents, who prefer a less stimulating lifestyle, may be baffled and challenged by these same outgoing kids.
2. noun
Wikipedia foundation.