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English definition of “light”

light

noun (BRIGHTNESS)    /laɪt/
B1 [U] the brightness that comes from the sun, fire, etc. and from electrical devices, and that allows things to be seen: a bright light fluorescent/ultraviolet light a beam/ray of light Light was streaming in through the open door. It's a north-facing room so it doesn't get much light (= brightness from the sun).Light A2 [C] a piece of equipment that produces light, such as a lamp or a bulb: Could you switch/turn the light on/off, please? She could see the city lights in the distance. As the lights went down, the audience grew quiet. My front bike light isn't working.Lighting and light fittings in the home
(Definition of light noun (BRIGHTNESS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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