WordReference Random House Learner's Dictionary of American English © 2019
en•light•en /ɛnˈlaɪtən/USA pronunciation   v. [+ object]
  1. to give intellectual understanding or knowledge to;
    instruct:to enlighten students.
en•light•en•ment, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2019
en•light•en  (en lītn),USA pronunciation v.t. 
  1. to give intellectual or spiritual light to;
    impart knowledge to:We hope the results of our research will enlighten our colleagues.
  2. [Archaic.]to shed light upon.
en•lightened•ly, adv. 
en•lightened•ness, n. 
en•lighten•er, n. 
en•lighten•ing•ly, adv. 
  • Middle English enli(g)htenen. See en-1, lighten1 1350–1400
    • 1.See corresponding entry in Unabridged illumine, edify, teach, inform.
    • 1.See corresponding entry in Unabridged mystify, confuse, perplex, puzzle.

Collins Concise English Dictionary © HarperCollins Publishers::

enlighten /ɪnˈlaɪtən/ vb (transitive)
  1. to give information or understanding to; instruct; edify
  2. to free from ignorance, prejudice, or superstition
  3. to give spiritual or religious revelation to
  4. poetic to shed light on

enˈlightening adj

'enlighten' also found in these entries:

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