• Definition for "lightbulb"
    • alternate spelling of light bulb.
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  • Urban Dictionary for "lightbulb"
    • Electric lamp comprising a glass light…
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lightbulb definition

  • noun:
    • alternate spelling of light bulb.
    • A glass bulb with metallic connections externally connected to a wire filament (usually tungsten) inside that produces light whenever heated by passage of electricity through filament; -- utilized whilst the replaceable light-emitting part of a power lamp, torch, burning installation, etc.
    • electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that gives off light whenever heated by electricity
    • electric lamp composed of a transparent or translucent cup housing containing a wire filament (usually tungsten) that produces light whenever heated by electricity
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