Blind level

Blind Blind, a. [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. [1913 Webster]

He that is strucken blind can not forget The precious treasure of his eyesight lost. --Shak. [1913 Webster]

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. [1913 Webster]

But hard be hardened, blind be blinded more, That they may stumble on, and deeper fall. --Milton. [1913 Webster]

3. Undiscerning; undiscriminating; inconsiderate. [1913 Webster]

This plan is recommended neither to blind approbation nor to blind reprobation. --Jay. [1913 Webster]

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. [1913 Webster]

5. Involved; intricate; not easily followed or traced. [1913 Webster]

The blind mazes of this tangled wood. --Milton. [1913 Webster]

6. Having no openings for light or passage; as, a blind wall; open only at one end; as, a blind alley; a blind gut. [1913 Webster]

7. Unintelligible, or not easily intelligible; as, a blind passage in a book; illegible; as, blind writing. [1913 Webster]

8. (Hort.) Abortive; failing to produce flowers or fruit; as, blind buds; blind flowers. [1913 Webster]

{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} (Zo["o]l.), 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 {Blank 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} (Zo["o]l.), a small, harmless, burrowing snake, of the family {Typhlopid[ae]}, 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. [1913 Webster]