[ ˌɛkstrə'mjʊər(ə)l ]
■ adjective
1》 Brit. (of a course of study) arranged for people who are not full-time members of a university or other educational establishment.
↘additional to one's studies.
2》 outside the walls or boundaries of a town or city.
Derivatives
~ly adverb
Origin
C19: from L. extra muros 'outside the walls' + -al .