Light bulb

//ˈlaɪtˌbʌlb// noun

Definitions

Noun
  1. 1
    An evacuated glass bulb containing a metal filament which is heated by electrical resistance to produce light.
  2. 2
    electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity wordnet
  3. 3
    An article that resembles such a bulb and converts electricity to light by any process. broadly

    "a fluorescent light bulb"

  4. 4
    Used in reference to the sudden arrival of a realization, an inspiration, an idea, or the like. figuratively

    "a light-bulb moment"

Etymology

From light + bulb First attested in 1885.

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