noun
working adult; full-fledged member of society
Refers to someone who has finished school and entered the workforce, or more broadly, a responsible, contributing member of society. Often contrasted with students.
来年の春から社会人になります。
I will become a working adult next spring.
社会人としてのマナーを身につける。
Acquire the manners expected of a full-fledged member of society.