B2idiominformalstudyIELTS-friendly
a light-bulb moment
USUK
a sudden moment when you understand something or have a good idea
Also written 'lightbulb moment'. Close to 'the penny dropped', but more about sudden ideas.
In context
When the teacher drew a picture, I had a real light-bulb moment about the present perfect.
Her light-bulb moment came on a bus, when she thought of the app idea.
More idioms about study
- a bookworma person who loves reading and reads a lot
- a bright sparksaid ironically about someone whose clever idea was actually silly
- a closed booka subject that you do not understand or know anything about
- a crash coursea short course that teaches a lot in a very short time
- a dab hand at somethingvery good at a particular skill or activity