Meaning of “internal” - Learner’s Dictionary

internal

adjective uk us /ɪnˈtɜːnəl/
INSIDE A PLACE

B2 happening or coming from inside a particular country, group, or organization:

an internal report
internal disputes
BODY

B2 inside your body:

internal injuries
PLACE

B2 inside a country, building, area, etc:

an internal flight
internal walls
→ Opposite external
internally adverb

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