Definitions of extracurricular
(often: extracurricular activities) a humorous term used to describe something that someone does secretly or unofficially outside the normal scope of their work or relationship. The term is often used to refer to sexual relationships.
The former Sudbury United player, famed for his extracurricular activities, finally divorced in 2013.
extracurricular activities are activities that are not part of your usual schooling or course of studies
Some schools share facilities with the local authority for lessons and extracurricular activities.