What does blind mean?
The definition of blind
Blind, a.
Etym: [AS.; akin to D., G., OS., Sw., & Dan. blind, Icel. blindr, Goth. blinds; of uncertain origin.]

1 Destitute of the sense of seeing, either by natural defect or by deprivation; without sight. He that is strucken blind can not forget The precious treasure of his eyesight lost. Shak.
2 Not having the faculty of discernment; destitute of intellectual light; unable or unwilling to understand or judge; as, authors are blind to their own defects. But hard be hardened, blind be blinded more, That they may stumble on, and deeper fall. Milton.
3 Undiscerning; undiscriminating; inconsiderate. This plan is recommended neither to blind approbation nor to blind reprobation. Jay.
4 Having such a state or condition as a thing would have to a person who is blind; not well marked or easily discernible; hidden; unseen; concealed; as, a blind path; a blind ditch.
5 Involved; intricate; not easily followed or traced. The blind mazes of this tangled wood. Milton.
6 Having no openings for light or passage; as, a blind wall; open only at one end; as, a blind alley; a blind gut.
7 Unintelligible, or not easily intelligible; as, a blind passage in a book; illegible; as, blind writing.
8 (Hort.)
Abortive; failing to produce flowers or fruit; as, blind buds; blind flowers. Blind alley, an alley closed at one end; a cul-de-sac.

— Blind axle, an axle which turns but does not communicate motion. Knight.
— Blind beetle, one of the insects apt to fly against people, esp. at night.
— Blind cat (Zoöl.), a species of catfish (Gronias nigrolabris), nearly destitute of eyes, living in caverns in Pennsylvania.
— Blind coal, coal that burns without flame; anthracite coal. Simmonds.
— Blind door, Blind window, an imitation of a door or window, without an opening for passage or light. See Blank door or window, under Blank, a.
— Blind level (Mining), a level or drainage gallery which has a vertical shaft at each end, and acts as an inverted siphon. Knight.
— Blind nettle (Bot.), dead nettle. See Dead nettle, under Dead.
— Blind shell (Gunnery), a shell containing no charge, or one that does not explode.
— Blind side, the side which is most easily assailed; a weak or unguarded side; the side on which one is least able or disposed to see danger. Swift.
— Blind snake (Zoöl.), a small, harmless, burrowing snake, of the family Typhlopidæ, with rudimentary eyes.
— Blind spot (Anat.), the point in the retina of the eye where the optic nerve enters, and which is insensible to light.
— Blind tooling, in bookbinding and leather work, the indented impression of heated tools, without gilding; — called also blank tooling, and blind blocking.
— Blind wall, a wall without an opening; a blank wall.

Blind, v. t.
[imp. & p. p. Blinded; p. pr. & vb. n. Blinding.]

1 To make blind; to deprive of sight or discernment. “To blind the truth and me.” Tennyson. A blind guide is certainly a great mischief; but a guide that blinds those whom he should lead is . . . a much greater. South.
2 To deprive partially of vision; to make vision difficult for and painful to; to dazzle. Her beauty all the rest did blind. P. Fletcher.
3 To darken; to obscure to the eye or understanding; to conceal; to deceive. Such darkness blinds the sky. Dryden. The state of the controversy between us he endeavored, with all his art, to blind and confound. Stillingfleet.
4 To cover with a thin coating of sand and fine gravel; as a road newly paved, in order that the joints between the stones may be filled.

Blind, n.
1 Something to hinder sight or keep out light; a screen; a cover; esp. a hinged screen or shutter for a window; a blinder for a horse.
2 Something to mislead the eye or the understanding, or to conceal some covert deed or design; a subterfuge.

3.
Etym: [Cf. F. blindes, pblende, fr. blenden to blind, fr. blind blind.] (Mil.)

A blindage. See Blindage.
4 A halting place. [Obs.] Dryden.