The power of perception by vision.

That which illumines or makes clear to the mind; mental or
spiritual illumination; enlightenment; knowledge; information.

The brightness of the eye or eyes.

Open view; a visible state or condition; public observation;
publicity.

The medium through which light is admitted, as a window, or
window pane; a skylight; in architecture, one of the compartments of a
window made by a mullion or mullions.

The time during which the light of the sun is visible; day;
especially, the dawn of day.

That agent, force, or action in nature by the operation of
which upon the organs of sight, objects are rendered visible or
luminous.

i. ışık, ışık veren şey, aydınlık. Could you please turn the lights off? (Işıkları söndürebilir misin lütfen?)

That which furnishes, or is a source of, light, as the sun,
a star, a candle, a lighthouse, etc.

Life; existence.