This is the 418th most frequent Persian word.
برق
Electricity; lightning.
In this context, 'برق' is used metaphorically to describe the sparkling or shining quality of someone's eyes.
چشمان او مثل برق میدرخشد.
His/her eyes shine like lightning.
In this sentence, 'برق' refers to electricity used in houses or businesses.
برق خانه قطع شده است.
The electricity at home is cut off.
Here, 'برق' denotes the natural phenomenon of lightning.