Light-bulb definition
A light-emitting device that consists of a gas-filled glass tube or bulb and is used inside electric light fixtures and flashlights.
noun
An evacuated glass bulb containing a metal filament which is heated by electrical resistance to produce light.
noun
Thomas Edison didn't invent the light bulb; but, in 1880 he made it more practical and useful by using bamboo for the filaments to have high electrical resistance.
noun
The definition of a light bulb is a way to channel electricity into a light fixture.
noun
In 1878 Joseph Swan developed a light bulb in England that used carbon paper instead of bamboo for the filaments.
noun
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They formed a company, Edison-Swan United, which was one of the biggest producers of light bulbs in the world.
An example of a light bulb is the incandescent light used in a lamp.
noun
(by extension) An article that resembles such a bulb and converts electricity to light by any process.
A fluorescent light bulb or an LED light bulb.
noun
(figuratively) Used in reference to the sudden arrival of a realization, an inspiration, an idea, or the like.
noun
Alternative form of light bulb.
noun
Other Word Forms
Noun
Singular:
light-bulb
Plural:
light-bulbs