What does "blind" mean?

Additional senses

1. 2.Undiscerning; undiscriminating; inconsiderate. This plan is recommended neither to blind approbation nor to blind reprobation. Jay.
2. 3.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.
3. 4.Involved; intricate; not easily followed or traced. The blind mazes of this tangled wood. Milton.
4. 5.Having no openings for light or passage; as, a blind wall; open only at one end; as, a blind alley; a blind gut.
5. 6.Unintelligible, or not easily intelligible; as, a blind passage in a book; illegible; as, blind writing.
6. 7.(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.
7. 8.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.
8. 9.To deprive partially of vision; to make vision difficult for and painful to; to dazzle. Her beauty all the rest did blind. P. Fletcher.
9. 10.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.
10. 11.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.
11. 12.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.
12. 13.Something to mislead the eye or the understanding, or to conceal some covert deed or design; a subterfuge.
13. 14.Etym: [Cf. F. blindes, pblende, fr. blenden to blind, fr. blind blind.] (Mil.) A blindage. See Blindage.
14. 15.A halting place. [Obs.] Dryden.
15. 16.See Blende.