a shelf on which to keep books
"The new bookshelf in the corner has plenty of room to keep all my favorite novels."
A shelf or shelves for storing books for easy visual reference.
"The bookshelf held her favorite novels in alphabetical order for quick access."
In plain English: A bookshelf is a piece of furniture with shelves used for holding books and other items.
"She carefully arranged her favorite novels on the wooden bookshelf in the living room."
Usage: The term refers specifically to furniture designed for holding books, distinct from general shelving units that may store other items. It is a standard compound noun where the two words are written together without spaces or hyphens.
The word bookshelf is a straightforward compound formed by combining the words book and shelf. It was first used to describe a piece of furniture designed specifically for holding books on its shelves.