Doors without glass.

Most commonly, this means the door design does not have a window in it. Bedroom doors for example probably would not have a glazed aperture.

There is usually a matching glazed door available and it may be you would want a combination of unglazed and glazed doors to suit different rooms in the property.

Occasionally, unglazed can mean the door has a glazing aperture, but without glass pre-fitted into the aperture. This allows you to choose the glass that you want for the door e.g. a patterned glass.