light bulb

play
noun \ˈlīt-ˌbəlb\
variants: or

lightbulb

Definition of light bulb

  1. :  an electric lamp: such asa :  one in which a filament gives off light when heated to incandescence by an electric current —called also incandescent, incandescent lampb :  fluorescent lamp

Illustration of light bulb

1884

First Known Use of light bulb

1884


LIGHT BULB Defined for Kids

light bulb

noun

Definition of light bulb for Students

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


Seen and Heard

What made you want to look up light bulb? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a person who is a bore or nuisance

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • peter-bruegel-tower-of-babel-painting
  • What language does pajama come from?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!