ETYM Old Eng. flasche, flaske; cf. Old Fren. flache, French flaque.
1. A lamp for providing momentary light to take a photograph; SYN. photoflash, flash lamp, flashgun, flashbulb.
2. A short vivid experience; SYN. flashing.
3. A sudden brilliant understanding.
4. A sudden intense burst of radiant energy.
1. To appear briefly.
2. To emit a brief burst of light.
3. To expose or show briefly.
4. To gleam or glow intermittently; SYN. blink, wink, twinkle, winkle.
5. To make known or cause to appear with great speed.
6. To protect by covering with a thin sheet of metal, as of parts of roofs.