/ɪkˌstrəˈkɜrɪkjəl/ – adjective
Definition: hoạt động ngoại khóa, không thuộc chương trình học chính thức.
A more thorough explanation: 1. (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.
2. extracurricular activities are activities that are not part of your usual schooling or course of studies
Example: 1. The former Sudbury United player, famed for his extracurricular activities, finally divorced in 2013.
2. Some schools share facilities with the local authority for lessons and extracurricular activities.