What does FLASH mean?

verb

1. gleam or glow intermittently“The lights were flashing”
2. appear briefly“The headlines flashed on the screen”
3. display proudly; act ostentatiously or pretentiously“he showed off his new sports car”
4. make known or cause to appear with great speed“The latest intelligence is flashed to all command posts”
5. run or move very quickly or hastily“She dashed into the yard”
6. expose or show briefly“he flashed a $100 bill”
7. protect by covering with a thin sheet of metal“flash the roof”
8. emit a brief burst of light“A shooting star flashed and was gone”