What is the meaning of the word "flash"?

Definitions:

a bright patch of color used for decoration or identification noun
- red flashes adorned the airplane
a short vivid experience noun
- a flash of emotion swept over him
a sudden brilliant understanding noun
- We had a flash of intuition when we finally realized how electricity flows from two terminal ends.
a very short time (as the time it takes the eye to blink or the heart to beat) noun
- if I had the chance I'd do it in a flash
appear briefly verb
- The headlines flashed on the screen
emit a brief burst of light verb
- A shooting star flashed and was gone
expose or show briefly verb
- They flashed some money and started receiving useful answers.
gleam or glow intermittently verb
- The lights were flashing
make known or cause to appear with great speed verb
- The latest intelligence is flashed to all command posts
protect by covering with a thin sheet of metal verb
- flash the roof
tastelessly showy adjective
- a flash car