What does enlighten mean?
Enlighten is a verb meaning to give someone greater knowledge, understanding, or insight — to lift them out of ignorance or confusion through instruction or explanation. It most often takes a person as its direct object and pairs naturally with prepositions such as 'about', 'on', and 'as to': 'She enlightened us on the history of the building.' Beyond everyday uses like 'could you enlighten me?', which can carry a hint of irony, the word has a profound spiritual dimension: in Buddhism, Hinduism, and other traditions, enlightenment denotes liberation of the mind from illusion and suffering. The word's cultural weight is immense — the Age of Enlightenment of the seventeenth and eighteenth centuries, with its emphasis on reason and science, took its very name from this verb. Derived forms include the adjective 'enlightened', the noun 'enlightenment', and the participial adjective 'enlightening'.
To give someone greater knowledge, understanding, or insight about a subject; to inform or instruct them, especially about something they were previously unaware of or mistaken about.
"The professor's remarks on medieval trade routes enlightened the whole seminar."
Almost always used with a person as object, commonly followed by 'about', 'on', or 'as to'.
(Of a spiritual experience) To awaken someone to ultimate truth or understanding, freeing their mind from ignorance, illusion, or attachment.
"The monk devoted his life to helping others become enlightened."
The word behind 'the Enlightenment' — an entire age of human history is named after this single verb.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of enlighten
Enlighten was formed in English in the late Middle Ages from the prefix 'en-' plus 'light', literally meaning to shed light upon something, in both physical and figurative senses. Its core root traces back through Old English 'leoht' to Proto-Germanic origins shared by German 'licht'. The figurative sense of imparting knowledge became dominant, and the abstract noun 'enlightenment' grew from it, eventually lending its name to the European intellectual movement of the eighteenth century. Cognates include the plain verb 'lighten' and the adjective 'light', all descending from the same ancient root for brightness.
Related word forms
How enlighten is actually used
Register is neutral-to-formal. The phrase 'please enlighten me' is often used with mild irony or sarcasm when asking someone to explain themselves. The verb typically appears with a person as object ('enlighten me/us/them') followed by 'about', 'on', or 'as to' the topic.
Easily confused with enlighten
Illuminate can mean literally to light up physically (e.g. a building), while enlighten is almost exclusively figurative, concerning knowledge or understanding.
Delight means to give great pleasure, whereas enlighten means to inform or impart understanding — similar sound, entirely different meanings.