What does blank mean?
The definition of blank
Blank, a.
Etym: [OE. blank, blonc, blaunc, blaunche, fr. F. blanc, fem. blanche, fr. OHG. blanch shining, bright, white, G. blank; akin to E. blink, cf. also AS. blanc white. Blink, and cf. 1st Blanch.]

1 Of a white or pale color; without color. To the blank moon Her office they prescribed. Milton.
2 Free from writing, printing, or marks; having an empty space to be filled in with some special writing; — said of checks, official documents, etc.; as, blank paper; a blank check; a blank ballot.
3 Utterly confounded or discomfited. Adam . . . astonied stood, and blank. Milton.
4 Empty; void; without result; fruitless; as, a blank space; a blank day.
5 Lacking characteristics which give variety; as, a blank desert; a blank wall; destitute of interests, affections, hopes, etc.; as, to live a blank existence; destitute of sensations; as, blank unconsciousness.
6 Lacking animation and intelligence, or their associated characteristics, as expression of face, look, etc.; expressionless; vacant. “Blank and horror-stricken faces.” C. Kingsley. The blank . . . glance of a half returned consciousness. G. Eliot.
7 Absolute; downright; unmixed; as, blank terror. Blank bar (Law), a plea put in to oblige the plaintiff in an action of trespass to assign the certain place where the trespass was committed; — called also common bar.

— Blank cartridge, a cartridge containing no ball.
— Blank deed. See Deed.
— Blank door, or Blank window (Arch.), a depression in a wall of the size of a door or window, either for symmetrical effect, or for the more convenient insertion of a door or window at a future time, should it be needed.
— Blank indorsement (Law), an indorsement which omits the name of the person in whose favor it is made; it is usually made by simply writing the name of the indorser on the back of the bill.
— Blank line (Print.), a vacant space of the breadth of a line, on a printed page; a line of quadrats.
— Blank tire (Mech.), a tire without a flange.
— Blank tooling. See Blind tooling, under Blind.
— Blank verse. See under Verse.
— Blank wall, a wall in which there is no opening; a dead wall.

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.
Blank, v. t.
[imp. & p. p. Blanked; p. pr. & vb. n. Blanking.] Etym: [Cf. 3d Blanch.]

1 To make void; to annul. [Obs.] Spenser.
2 To blanch; to make blank; to damp the spirits of; to dispirit or confuse. [Obs.] Each opposite that blanks the face of joy. Shak.