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The act of illuminating, or supplying with light; the state of being illuminated.

Tending to illuminate or illustrate; throwing light; illustrative. "Illuminative reading." Carlyle.

ccupation is to adorn books, especially manuscripts, with miniatures, borders, etc. See Illuminate, v. t., 3.

To illuminate; to light up; to adorn.

One who, or that which, illuminates.

To throw rays of light upon; to illuminate; to brighten; to adorn with luster. Thy smile irradiates yon blue fields. Sir W. Jones.

cture which represents those objects upon which the light is supposed to fall; the more illuminated part of a landscape or other scene; -- opposed to shade. Cf. Chiaroscuro.

To make light or clear; to light; to illuminate; as, to lighten an apartment with lamps or gas; to lighten the streets. [In this sense less common than light.] A key of fire ran all along the shore, And lightened all the river with a blaze. Dryden.

Illuminated. [Obs.] Wyclif.

One who illuminates books. [Archaic]

taining to a lamp. Lucernal microscope, a form of the microscope in which the object is illuminated by means of a lamp, and its image is thrown upon a plate of ground glass connected with the instrument, or on a screen independent of it.

Illuminated; full of light; bright; as, many candles made the room luminous. Up the staircase moved a luminous space in the darkness. Longfellow.

Covered over, shaded, or darkened; destitute of light; imperfectly illuminated; dusky; dim. His lamp shall be put out in obscure darkness. Prov. xx. 20.

Of or pertaining to a penumbra; resembling a penumbra; partially illuminated.

ng shifting effects of color to a photograph. The unmounted print, made translucent, is illuminated from behind with colored light.

n apparatus consisting of a large wheel with spokes, which when turning very rapidly is illuminated by momentary flashes of light passing through slits in a rotating disk. By properly timing the succession of flashes the wheel is made to appear to be motionless, or to rotate more or less slowly in either direction.…

Quadrature of the moon (Astron.), the position of the moon when one half of the disk is illuminated. -- Quadrature of an orbit (Astron.), a point in an orbit which is at either extremity of the latus rectum drawn through the empty focus of the orbit.

To enlighten; to illuminate; to shed light or brightness on; to irradiate. [R.]

Destitute of rays; hence, dark; not illuminated; blind; as, a rayless sky; rayless eyes.

Reflection; the light reflected from an illuminated surface to one in shade. Yon gray is not the morning's eye, 'Tis but the pale reflex of Cynthia's brow. Shak. On the depths of death there swims The reflex of a human face. Tennyson.