Definition of "light bulb" [light bulb]

• An electric light in which a filament is heated to incandescence by an electric current. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "He sat up in bed and groped for the switch to the light bulb in the tulip-shaped opal glass covering attached to the wall above the headboard."
• "To adapt Charlton Heston: They can pry the last incandescent light bulb out of my cold, dead hands."
• "The inside of the shade creates an elliptical shape and the strong white area in the top central portion is the light bulb which also gives off a halation creating the ‘bump’ on the top of this reflection."