light

¹light

noun \ˈlīt\

Definition of LIGHT

1

a : the sensation aroused by stimulation of the visual receptors b : an electromagnetic radiation in the wavelength range including infrared, visible, ultraviolet, and X-rays and traveling in a vacuum with a speed of about 186,281 miles (300,000 kilometers) per second; specifically : the part of this range that is visible to the human eye

2

: a source of light