Definition of blank:
; lacking characteristics which give variety; free from writing, printing, or marks; having an empty space to be filled in; as, blank paper; a blank check; a blank ballot
a bullet that doesn't harm; a cartridge inserted into a gun that fires no projectile; a void space on a paper
to make void; to erase
; to prevent from scoring
, as in a sporting event
"I blanked out my previous entry."