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. 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. Undiscerning; undiscriminating; inconsiderate. This plan is recommended neither to blind approbation nor to blind reprobation. Jay. 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. Involved; intricate; not easily followed or traced. The blind mazes of this tangled wood. Milton. Having no openings for light or passage; as, a blind wall; open only at one end; as, a blind alley; a blind gut. Unintelligible, or not easily intelligible; as, a blind passage in a book; illegible; as, blind writing. 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.