ex ‧ tra ‧ mu ‧ ral /ˌekstrəˈmjʊərəl◂ $ -ˈmjʊr-/ BrE AmE adjective [only before noun]
[ Date: 1800-1900 ; Language: Latin ; Origin: extra muros 'outside the walls' ]
1 . relating to a place or organization but happening or done outside it:
extramural activities
2 . especially British English extramural courses are for people who are not ↑ full-time students