Enlighten \En*light"en\, v. t. [Pref. en- + lighten: cf. AS.
   inl[imac]htan. Cf. {Enlight}.]
   1. To supply with light; to illuminate; as, the sun
      enlightens the earth.
      
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            His lightnings enlightened the world. --Ps. xcvii.
                                                  4.
      
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   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.
      
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            The conscience enlightened by the Word and Spirit of
            God.                                  --Trench.
      
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