blind

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Sightless.
• adjective Having a maximal visual acuity of the better eye, after correction by refractive lenses, of one-tenth normal vision or less (20/200 or less on the Snellen test).
• adjective Of, relating to, or for sightless persons.
• adjective Performed or made without the benefit of background information that might prejudice the outcome or result.
• adjective Performed without preparation, experience, or knowledge.
• adjective Performed by instruments and without the use of sight.
• adjective Unable or unwilling to perceive or understand.
• adjective Not based on reason or evidence; unquestioning.
• adjective Slang Drunk.
• adjective Lacking reason or purpose.
• adjective Difficult to comprehend or see; illegible.
• adjective Incompletely or illegibly addressed.
• adjective Hidden from sight.
• adjective Screened from the view of oncoming motorists.
• adjective Secret or otherwise undisclosed.
• adjective Closed at one end.
• adjective Having no opening.
• adjective Botany Failing to produce flowers or fruits.
• noun Blind people considered as a group. Used with the:
• noun Something, such as a window shade or a Venetian blind, that hinders vision or shuts out light.
• noun A shelter for concealing hunters, photographers, or observers of wildlife.
• noun Something intended to conceal the true nature, especially of an activity; a subterfuge.
• noun A forced bet in poker that is placed before the cards are dealt.
• adverb Without seeing; blindly.
• adverb Without the aid of visual reference.
• adverb Without forethought or provision; unawares.
• adverb Without significant information, especially that might affect an outcome or result.
• adverb Informal Into a stupor.
• adverb Used as an intensive.
• transitive verb To deprive of sight.
• transitive verb To dazzle.
• transitive verb To deprive of perception or insight.
• transitive verb To withhold light from.

from The Century Dictionary.

• noun Anything which obstructs the sight, intercepts the view, or keeps out light.
• noun Specifically— A screen of some sort to prevent too strong a light from shining in at a window, or to keep people from seeing in; a sun-screen or shade for a window, made of cloth, laths, etc., and used either inside or outside.
• noun One of a pair of pieces of leather, generally square, attached to a horse's bridle on either side of his head to prevent him from seeing sidewise or backward; a blinder or blinker.
• noun A strong plank shutter placed in front of a port-hole as soon as the gun has been discharged.
• noun Something intended to mislead the eye or the understanding by concealing, or diverting attention from, the principal object or true design; a pretense or pretext.
• noun A hiding-place; an ambush or covert, especially one prepared for concealing a hunter or fowler from his game.
• noun Milit., a kind of bomb-proof shelter for men or material; a blindage.
• noun A single blind is commonly made of three strong perpendicular posts with planks between them, covered with plates of iron on the outside, rendering them shot-proof. It is used as a protection to laborers in the trenches. A double blind is made by filling large wooden chests with earth or bags of sand.
• noun In the game of poker, the stake deposited in the pool previous to the deal.
• To make blind; deprive of sight; render incapable of seeing, wholly or partially.
• To dim the perception or discernment of; make morally or intellectually blind.
• To render dark, literally or figuratively; obscure to the eye or to the mind; conceal.
• To dim or obscure by excess of light; outshine; eclipse.