What is "in blank"

Blank \Blank\, n.

1. Any void space; a void space on paper, or in any written instrument; an interval void of consciousness, action, result, etc; a void.

   I can not write a paper full, I used to do; and yet I will not forgive a blank of half an inch from you.
   --Swift.

   From this time there ensues a long blank in the history of French legislation.
   --Hallam.

   I was ill. I can't tell how long -- it was a blank.
   --G. Eliot.

2. A lot by which nothing is gained; a ticket in a lottery on which no prize is indicated.

   In Fortune's lottery lies A heap of blanks, like this, for one small prize.
   --Dryden.

3. A paper unwritten; a paper without marks or characters a blank ballot; -- especially, a paper on which are to be inserted designated items of information, for which spaces are left vacant; a bland form.

   The freemen signified their approbation by an inscribed vote, and their dissent by a blank.
   --Palfrey.

4. A paper containing the substance of a legal instrument, as a deed, release, writ, or execution, with spaces left to be filled with names, date, descriptions, etc.

5. The point aimed at in a target, marked with a white spot; hence, the object to which anything is directed.

   Let me still remain The true blank of thine eye.
   --Shak.

6. Aim; shot; range. [Obs.]

   I have stood . . . within the blank of his displeasure For my free speech.
   --Shak.

7. A kind of base silver money, first coined in England by Henry V., and worth about 8 pence; also, a French coin of the seventeenth century, worth about 4 pence.
   --Nares.

8. (Mech.) A piece of metal prepared to be made into something by a further operation, as a coin, screw, nuts.

9. (Dominoes) A piece or division of a piece, without spots; as, the ``double blank''; the ``six blank.''

   In blank, with an essential portion to be supplied by another; as, to make out a check in blank.