illuminate

Definitions

General English

Aviation

  • verb to give light to an otherwise dark area
  • verb to show a light or become bright

Information & Library Science

  • verb to shine light on something
  • verb to make things clear by explaining them

Media Studies

  • verb to decorate a letter or a page with colour, gold or silver ornamentation

Publishing

  • verb to illustrate a medieval manuscript

Origin & History of “illuminate”

Etymologically, illuminate is a parallel construction to enlighten. It was formed in the late Latin period from the prefix in- and lūmen ‘light’ (source of English luminous). The past participle of the resulting illumināre gave English illuminate. The medieval-sounding sense ‘illustrate manuscripts’ is actually quite recent, replacing in the 18th century the parallel formation enlumine, acquired by English in the 14th century via Old French enluminer from medieval Latin inlūmināre. Illumine (14th c.) came via Old French illuminer. Illustrate is closely related.
http://www.dictionarycentral.com/definition/illuminate.html