noun
a system of writing or printing for blind or visually impaired people, in which varied arrangements of raised dots representing letters and numerals are identified by touch
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Braille is a system of raised dots that can be felt with the fingertips and used by people who are visually impaired.
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I learned how to read Braille so I can help my visually impaired friend.
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Some people think Braille is like secret code for blind people.
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Learning to read Braille opened up a whole new world of understanding for me.