What is the collective noun for shelf?

There isn't a widely accepted or commonly used collective noun for shelves.

Here's why:

* Shelves are typically arranged together (think of a bookcase), so it's less common to refer to them as a group.

* "Shelf" is a relatively simple noun, making it less necessary to use a collective.

You could use more general collective nouns like "collection," "array," "series," or "set" to describe a group of shelves.

For example:

* "The collection of shelves held a diverse range of books."

* "The array of shelves stretched across the entire wall."

Ultimately, the best way to refer to a group of shelves depends on the context and what you want to emphasize.