- an electric light.
Origin of light bulb
First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a glass bulb containing a gas, such as argon or nitrogen, at low pressure and enclosing a thin metal filament that emits light when an electric current is passed through itSometimes shortened to: bulb
Word Origin and History for light bulb
Online Etymology Dictionary, © 2010 Douglas Harper