from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One that illuminates, especially a device for producing, concentrating, or reflecting light.
- n. One who illuminates manuscripts or other objects.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Agent noun of illuminate; one who illuminates; an explainer.
from the GNU version of the Collaborative International Dictionary of English
- n. One whose occupation is to adorn books, especially manuscripts, with miniatures, borders, etc. See illuminate, v. t., 3.
- n. A condenser or reflector of light in optical apparatus; also, an illuminant.
from The Century Dictionary and Cyclopedia
- n. One who or that which illuminates or gives light; a natural or artificial source of light, literally or figuratively: as, the sun is the primary illuminator.
- n. One who decorates manuscripts, books, etc., with ornamental pictures, designs, letters, etc., in the style called illumination.
- n. A lens or mirror in a microscope or other optical instrument for concentrating the light.
- n. A glass tile or floor-light.
- n. An apparatus for directing a beam of light upon some object, as in lighting parts of the body in surgical or medical examinations.
- n. A device for carrying a small electric light into the mouth in examining the teeth.
to illuminate + -or (Wiktionary)