|Origin:||internalis, from Latin internus 'inward, inside'|
in‧ter‧nal W2 [usually before noun]
within a particular country [= domestic; ≠ external]:
We have no interest in interfering in the internal affairs of other countries.
the threat to internal security
within a company or organization rather than outside it [≠ external]:
There's to be an internal inquiry into the whole affair.
the internal mail
inside your body [≠ external]
inside something rather than outside [≠ external]:
They've knocked down a couple of internal walls.
existing in your mind [= inner]:
The matter will be dealt with internally.
This medicine must not be taken internally.