What is an "item" in Rust?

Question

The Rust Book makes several references to the word "item", which confers the word a technical meaning in the context of the Rust programming language. For example, see Chapter 07-03:

The way privacy works in Rust is that all items (functions, methods, structs, enums, modules, and constants) are private by default. Items in a parent module can’t use the private items inside child modules, but items in child modules can use the items in their ancestor modules.

What is an item and is there a comprehensive list of all the kinds that there are in Rust?

Answer 1

Items - Rust Reference:

An item is a component of a crate. [...] There are several kinds of items:

• Modules
• extern crate declarations
• use declarations
• Function definitions
• Type definitions
• Struct definitions
• Enumeration definitions
• Union definitions
• Constant items
• Static items
• Trait definitions
• Implementations
• extern blocks

Answer 2

An item is simply any declaration that could appear globally in a program or module, such as a fn, struct, or use.

Reference: Programming Rust: Fast, Safe Systems Development (2nd Edition)