Definition from macmillandictionary.com
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a blank sheet of paper
Write your name in the blank space at the top of the page.
The last three boxes should be left blank.
a blank tape/disk/video
He was tired of staring at the four blank walls.
He seemed to be staring at a blank television screen.
Suddenly my computer screen went blank.
His eyes were blank and he barely responded to us.
a blank look/expression/face