What is the meaning of Textbook?

A coursebook, a formal manual of instruction in a specific subject, especially one for use in schools or colleges.

Of or pertaining to textbooks or their style, especially in being dry and pedagogical; textbooky, textbooklike.

Having the typical characteristics of some class of phenomenon, so that it might be included as an example in a textbook.

Done exactly correctly, in an exemplary way that might be described in a textbook.

Learned from, or as if learned from, a textbook, as opposed to personal discovery or experience.

Source: wiktionary.org