Bulb - definition, pronunciation, transcription

Amer.  |bĘŚlb|  American pronunciation of the word bulb
Brit.  |bĘŚlb|  British pronunciation of the word bulb


- a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
- electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity (syn: lightbulb)
- a rounded part of a cylindrical instrument (usually at one end)
- anything with a round shape resembling a teardrop
- lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata) (syn: medulla)
- a rounded dilation or expansion in a canal or vessel or organ


A new kind of light bulb that uses very little electricity

The light bulb was one of the most important inventions of the 19th century.

Screw the light bulb into the fixture.

The light bulb screws right in.

A light bulb dangled from the ceiling.

the coil in a light bulb

The bulb's gone in the bathroom.

A naked light bulb dangled from the ceiling.

I'm not very practical - I can't even change a light bulb.

the implosion of a light bulb

Use a bulb with low wattage.

Word forms

singular: bulb
plural: bulbs
See also:  WebsterWiktionaryLongman