light bulb

noun \ ˈlīt-ˌbəlb \
variants: or lightbulb
Updated on: 16 Dec 2017

Definition of light bulb

: an electric lamp: such as
a : one in which a filament gives off light when heated to incandescence by an electric current called also incandescent, incandescent lamp

Recent Examples of light bulb from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light bulb.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Illustration of light bulb

First Known Use of light bulb

1884



LIGHT BULB Defined for Kids

light bulb

noun

Definition of light bulb for Students

: a lamp in which a glow is produced by the heating of a wire by an electric current

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