BLANK

[noun] [C]A blank is a space left in a piece of writing, or on a form, for information to be added.Fill in the blanks in this form.A blank is also something not yet marked or finished, such as a door key that is not yet cut.(figurative) My mind was a (complete) blank (= I could not remember or think of anything).A blank (cartridge) is a cartridge containing explosive but no bullet.He fired a blank at the police officers.