blindblindblindsblindedblindingblinderblindest2nouna piece of cloth or other material that you pull down to cover a windowblindblindblindsblindedblindingblinderblindest1adjectivenot able to see: My grandad is going blind.He trains guide dogs for the blind (= people who are not able to see).▶ blindnessnoun (no plural): The disease can cause blindness.