light bulb

Definitions

1. An evacuated glass bulb containing a metal filament which is heated by electrical resistance to produce light.
2. An article that resembles such a bulb and converts electricity to light by any process.
   broadly
3. Used in reference to the sudden arrival of a realization, an inspiration, an idea, or the like.
   figuratively

Equivalents

Examples

“a fluorescent light⟳ bulb”

“an LED light⟳ bulb”

“a light-bulb moment”

“Figuratively speaking, a light-bulb flashed over Galvin's head early this year, and in March⟳–along […]”

“A light⟳ bulb went off in my head as I had an incredible idea for a beauty product.”

CEFR level