1. give (someone) greater knowledge and understanding about a subject or situation: "Christopher had not enlightened Frances as to their relationship"Similarinformmake awarenotifytelladviselet knowilluminateopen someone's eyesappriseexplain the situation toexplain the circumstances todescribe the state of affairs tobriefupdategive details togive information tobring up to dateinformal:clue infill input wisetip offput in the picturebring up to speedOppositekeep in the dark
Word OriginMiddle English (in the sense ‘make luminous’; formerly also as inlighten): in early use from Old English inlīhtan ‘to shine’; later from en-1, in-2 (as an intensifier) + lighten2 or the noun light1.