Webster's Revised Unabridged Dictionary · 1913

Enlighten

Enlighten , transitive verb

[Prefix en- + lighten: compare Anglo-Saxon inlīhtan. Compare Enlight.]

1.
To supply with light; to illuminate; as, the sun enlightens the earth.
His lightnings enlightened the world. — Bible (KJV) - Psalm xcvii. 4
2.
To make clear to the intellect or conscience; to shed the light of truth and knowledge upon; to furnish with increase of knowledge; to instruct; as, to enlighten the mind or understanding.
The conscience enlightened by the Word and Spirit of God. — Trench