1. a person or thing that illuminates.
  2. a device for illuminating, as a light source with a lens or mirror for concentrating light.
  3. a person who paints manuscripts, books, etc., with designs in color, gold, or the like.

Origin of illuminator

1475–85; < Late Latin illūminātor, equivalent to illūminā(re) (see illumine) + -tor -tor Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for illuminator

Historical Examples of illuminator