A lightbulb is a small, light device that is used to light up a room. It is usually made of plastic or metal, and it has a cord that plugs into a power source.

  • I need a lightbulb for the porch, because the light is too weak.

  • I replaced the lightbulb in the hallway.

Definition of lightbulb


electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity


bulb, electric-light bulb, electric light, incandescent lamp, light bulb

Nearby Words

lightbulb Pronunciation in a video

Example Sentences for lightbulb

  • 1

    One to change the lightbulb and one to not change the lightbulb.

  • 2

    It was either this or the lightbulb...

  • 3

    Not a lightbulb joke, but funny.

  • 4

    A lightbulb is square, and if it's not, it should be.

  • 5

    Death by lightbulb no fun, agreed.

  • 6

    Edison is commonly credited with the lightbulb.

  • 7

    Not the brightest lightbulb in the package, either.

  • 8

    A common example of this is lightbulb holders.

  • 9

    Try a different voltage lightbulb.

  • 10

    Paper or the lightbulb or the car or the dishwasher or the compiler