INTERNAL

In‐tern″al (?), a. [[L. internus; akin to interior. See Interior.]] 1. 1. Inward; interior; being within any limit or surface; inclosed; — opposed to external; as, the internal parts of a body, or of the earth.
2. 2. Derived from, or dependent on, the thing itself; inherent; as, the internal evidence of the divine origin of the Scriptures.
3. 3. Pertaining to its own affairs or interests; especially, (said of a country) domestic, as opposed to foreign; as, internal trade; internal troubles or war.
4. 4. Pertaining to the inner being or the heart; spiritual.
With our Savior, internal purity is everything. Paley. 5. 5. Intrinsic; inherent; real.
The internal rectitude of our actions in the sight of God. Rogers. 6. 6. (Anat.) Lying toward the mesial plane; mesial.
Internal angle (Geom.), an interior angle. See under Interior. — Internal gear (Mach.), a gear in which the teeth project inward from the rim instead of outward. Syn. — Inner; interior; inward; inland; inside.