flash

1 flash /ˈflæʃ/ verb
flashes; flashed; flashing
1 flash
/ˈflæʃ/
verb
flashes; flashed; flashing
Britannica Dictionary definition of FLASH
1 
: to shine or give off bright light suddenly or in repeated bursts
[no object]
[+ object]
2 
a  : to appear quickly or suddenly
[no object]
[+ object]
b  [no object] : to move or pass very quickly
3 
[no object] of the eyes : to show strong emotion
4 
[+ object] : to show (something) briefly
5 
informal : to show your sexual organs to (someone) suddenly and briefly in public
[+ object]
[no object]
— see also flasher
2 flash /ˈflæʃ/ noun
plural flashes
2 flash
/ˈflæʃ/
noun
plural flashes
Britannica Dictionary definition of FLASH
1 
[count] : a sudden bright light
2 
[count] : a sudden appearance or occurrence of something
— see also hot flash
3 
[noncount] usually disapproving : a fancy or exciting quality or appearance that is meant to attract attention to something that is usually not very good or interesting
4 
: a device that is used to produce a brief and very bright flash of light for taking photographs
[count]
[noncount]
— see picture at camera; compare flashbulb
5 
[count] : news flash

(as) quick as a flash

informal
: very quickly

flash in the pan

: a person or thing that fails after being very popular or successful for a brief time

in a flash

informal
: very quickly or suddenly
3 flash /ˈflæʃ/ adjective
3 flash
/ˈflæʃ/
adjective
Britannica Dictionary definition of FLASH
1 
always used before a noun : beginning suddenly and lasting only a short time
2 
always used before a noun, US, informal : very talented
3 
[more flash; most flash] British, informal + disapproving : flashy, showy