This is the 8311th most frequent Russian word.
мещанском
The Russian word "мещанском" refers to something related to the petty bourgeoisie, embodying narrow-mindedness or a focus on small, material concerns.
The term 'мещанском' is used here as an adjective to describe the district, connoting middle-class characteristics.
Он жил в мещанском районе города.
He lived in a bourgeois district of the city.
In this context, 'мещанском' is associating the nature of the discussions with the limited perspective or scope commonly attributed to the bourgeoisie.
Споры велись на мещанском уровне.
The debates were conducted at a petty-bourgeois level.
Here, 'мещанском' characterizes the thinking as materialistic or not open to creative or progressive ideas.