Meaning of OUTER in English
out ‧ er /ˈaʊtə $ -ər/ BrE AmE adjective [only before noun]
[ Date: 1300-1400 ; Origin: out ]
1 . on the outside of something OPP inner :
Remove the tough outer leaves before cooking.
2 . further from the centre of something OPP inner :
the outer suburbs
3 . relating to objects, activities etc that are part of the world, as opposed to your own thoughts and feelings OPP inner :
His inner conflict is related to struggles in the outer world.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012