light bulb

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English[edit]

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Wikipedia

A light bulb.

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Etymology[edit]

light + bulb, from Middle French bulbe, from Latin bulbus (bulb, onion), from Ancient Greek βολβός (bolbos, plant with round swelling on underground stem).

Noun[edit]

light bulb (plural light bulbs)

  1. An evacuated glass bulb containing a metal filament which is heated by electrical resistance to produce light.
  2. (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
  3. (figuratively) Used in reference to the sudden arrival of a realization, an inspiration, an idea, or the like.
    • 1949, in Forbes (magazine), volume 64,[1] page 18:
      Figuratively speaking, a light-bulb flashed over Galvin's head early this year, and in March–along []
    • 2010, Sandy Abrams, Your Idea, Inc., Abrams Media, ISBN 978-1-59869-909-8, page xi:
      A light bulb went off in my head as I had an incredible idea for a beauty product.

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