Meaning of “inner” - Learner’s Dictionary

inner

adjective [ always before noun ] uk us /ˈɪnər/
INSIDE

B2 on the inside, or near the middle of something:

The monastery is built around an inner courtyard.
→ Opposite outer
PRIVATE

B2 Inner feelings, thoughts, etc are ones that you do not show or tell other people:

a profound sense of inner peace

(Definition of “inner” from the Cambridge Learner’s Dictionary © Cambridge University Press)