Extracurricular
Part of speech: adjective
Definition: Outside of the normal curriculum of an educational establishment Similarly outside of the normal duties of a job or profession extramarital
Part of speech: noun
Definition: An activity outside the normal academic curriculum. An activity beyond official duties of a job or profession. An extramarital affair.
Illicit
Part of speech: adjective
Definition: Lacking licitness, but not invalid.Breaking social norms.Unlawful.