The phrase "glass windows" refers to the windows made of glass material, which allow us to see through and let light enter buildings or vehicles. Full definition
Its stories were represented in the sculpture and stained glass windows of medieval churches, and Western literature has been profoundly influenced by its characters, themes and symbols. (religion-online.org)
At its east end, like the stained glass window of a cathedral, is a giant vertical screen. (theguardian.com)
This house has all the original built in china closets and a buffet plus two original stained glass windows in the dining room. (theletteredcottage.net)