English definition of “light”
BRIGHTNESS [U] › the brightness that shines from the sun, from fire, or from electrical equipment, allowing you to see things: bright/dim light fluorescent/ultraviolet light a beam ray of light Light was streaming in through the open door.
DEVICE [C] › a device which produces light: car lights to switch/turn the light on They must be in bed - I can't see any lights on anywhere.
a light › a flame from a match, etc used to make a cigarette start burning: Have you got a light, please?
set light to sth UK › to make something start burning
in the light of sth (also US in light of sth) › If something is done or happens in the light of facts, it is done or happens because of those facts: The drug has been withdrawn in the light of new research. → See also green light → See also street light → See also tail light → See also traffic light