Unlike, the revised AR format, the answer is not in the footer. There are many examples but here is one:

I would say windows at the top of a wall, to let light in without sacrificing privacy.

Thanks Michael Jacobs & Lyn Sims & Kathleen Daniels Reminds me of a few windows in my childhood home built in 1889 but I don't have any pictures.

I'm glad Michael Jacobs included a picture of a window..we do use that term for windows that are located on the upper wall portion of a wall so more natural light can fill the room!

Kathleen Daniels After seeing Michael Jacobs photo, I know what they are, but am not familiar with the term.

windows that are located on the upper wall portion of a soaring ceiling.....lets light in .... 

I'm glad Michael Jacobs included a picture, because I have never heard of them described as such (usually described as "how do I get blinds for those windows?")

Evidently something looking like a transom window?

Looks like others have the answer

top windows - for lighting

Windows towards the top to let sunshine in

"I can see clearly now the rain has come"

Although I knew, I looked for the "historical" answer with the help of Mr. Google:

The technology of the clerestory appears to originate in the temples of ancient Egypt. The term "clerestory" is applicable to Egyptian temples, where the lighting of the hall of columns was obtained over the stone roofs of the adjoining aisles, through slits pierced in vertical slabs of stone. Clerestory appeared in Egypt at least as early as the Amarna period.

One of my contemporary homes has clerestory windows all around...just perfect for letting in the light and still providing privacy.

Windows that are high up on the wall, above eye level.

They are windows that can see over the floor in front of them

even more interesting is what the correct pronunciation is of "clerestory windows"

They are what I have across my living room on top of the other windows and doors - gorgeous windows.

Upper wall windows you could say.

Typically clerestory was an upper level in a building like a church...

and hence, the clerestory windows... which threw light in the upper areas.

Transom windows don't really qualify.

I too am familiar with the idea, but not the term. I have also seen these on interior walls above doors in order to add light to a room - are those also considered "clerestory windows"?

They add alot to a room, outside of more light - very popular in homes in our niche Kathleen Daniels.  They are high windows that are small (not tiny) and close to the ceiling - no need for blinds or shades - as no one can see in or out of them.  It is a nice feature.

Looks like Michael has given you an example.

Thanks .

and I thought it was in Church:)) thanks to Michael Jacobs  visual now I know:))

Kathleen Daniels - thanks for the question.

Now I know the answer, too - thanks Michael Jacobs .

I like Carol Williams answer.

I like Carol Williams answer!

That was a new term for me too.

Yes, what we call transom windows.  Let the sunshine in!

I had a general idea but now I know more. Seems to me most of them, because of the challenge of accessing, are only for light, not air.

I am not familiar with the term. We call those transom and some are operable and some are not.

Here's my Just For Fun answer:   They are a great excuse for stained glass!  (Or that coloured static film you can get that looks like stained glass or other beautiful art.)

What?