Webster's Revised Unabridged Dictionary · 1913

External

External , adjective

[Latin externus, from exter, exterus, on the outside, outward. See Exterior.]

1.
Outward; exterior; relating to the outside, as of a body; being without; acting from without; -- opposed to internal; as, the external form or surface of a body.
Of all external things,... She [Fancy] forms imaginations, aery shapes. — Milton
2.
(Metaphysics) Outside of or separate from ourselves; (Metaphysics) separate from the perceiving mind.
3.
Outwardly perceptible; visible; physical or corporeal, as distinguished from mental or moral.
Her virtues graced with external gifts. — Shakespeare
4.
Not intrinsic nor essential; accidental; accompanying; superficial.
The external circumstances are greatly different. — Trench
5.
Foreign; relating to or connected with foreign nations; as, external trade or commerce; the external relations of a state or kingdom.
6.
(Anatomy) Away from the mesial plane of the body; lateral.
Collocations (1)
External angles (Geometry) , See under Angle.

External , noun

Something external or without; outward part; that which makes a show, rather than that which is intrinsic; visible form; -- usually in the plural.
Adam was then no less glorious in his externals — South
God in externals could not place content. — Pope