What’s a pawn wall

I’m still learning. What is a pawn wall? I’ve seen the word used in different contexts, but I don’t understand.

I know I sound stupid, though.

In the Staunton Museum the walls are made out of pawns. A pawn wall is one of these walls.

On the topic of pawn structure, "pawn walls" aren't something I've seen a true definition of. Some examples of more important pawn definitions to look into, in my view, are:

• isolated pawns Isolated pawn - Wikipedia
• doubled pawns Doubled pawns - Wikipedia
• backwards pawns Backward pawn - Wikipedia

To your question, however, I think this term is typically used to define a group of 2+ side-by-side pawns that take space (control enemy territory). The three pawns in the center of this position would be referred to as a pawn wall:

Thanks.

I never heard of a pawn wall lol

A pawn wall is a lineup of pawns that prevents the opponent's pieces from advancing past them (hence the term). Generally, these pawn walls can be broken down by advancing pawns of your own into it.