IPA: /ˌɛkstrəˈmjʊrəl/
KK: /ˌɛkstrəˈmjʊrəl/
Relating to activities or programs that take place outside the usual boundaries of an organization, such as a school or hospital.
The university offers extramural courses for students who want to learn outside the traditional classroom setting.
Extramural → It is formed from "extra-" (meaning outside) and "muralis" (from Latin "murus", meaning wall). The word refers to activities or events that take place outside the walls, particularly in the context of education or institutions.
Think of activities happening 'outside' ('extra-') the 'walls' ('muralis') of a school or institution — that's what extramural means.