flash up

1 of 1verb

/ˈflæʃ ʌp/

Forms:flashes up,flashing up,flashed up,flashed up

1

to suddenly appear very briefly on a screen or display

A warning message flashed up on the screen.
Watch the screen — a code will flash up in a second.
The warning is flashing up repeatedly.
Nothing has flashed up so far.
They noticed the same alert was flashing up yesterday.