(adjective)
lacking awareness or perception in some situation, for example done without having certain information and/or without being able to see;
e.g. He was blind to their faults because he cared so much about them. We did a blind test of each soap so we could see which was best without being biased.
(adjective)
done without judgement, reason, or questioning;
e.g. I didn't like their blind acceptance of the instructions.
(adjective)
hidden from view, difficult or impossible to see;
e.g. Go slow on the blind turn so that you don't hit any oncoming cars.
(verb)
to temporarily or permanently cause someone to be unable to see, either literally or figuratively as to make them unable to judge or understand something clearly;
e.g. The sun was bright enough to blind us for a few moments when we stepped outside.
(noun)
collectively, people who do not have the ability to see (used as "the blind");
e.g. He has worked at a school for the blind for a few years.
(noun)
a screen or covering for a window, especially one made of slats/panels or one mounted on a roller (sometimes used as "blinds");
e.g. She opened the blind to let sunlight into the room.