package

Category: Where you actually do the work

package — A bundled, named, versioned piece of reusable code you can drop into your project. Most often used interchangeably with "dependency."

Why you care

The distinction is fuzzy in practice. Strictly: a package is a thing other people publish; a dependency is something your project uses. Most of what you install is both.

When you hear it

"Install the package." "That package is out of date."