Definitions
1.NounA coursebook, a formal manual of instruction in a specific subject, especially one for use in schools or colleges.
2.AdjectiveOf or pertaining to textbooks or their style, especially in being dry and pedagogical; textbooky, textbooklike.
3.AdjectiveHaving the typical characteristics of some class of phenomenon, so that it might be included as an example in a textbook.
4.AdjectiveDone exactly correctly, in an exemplary way that might be described in a textbook."Well done everyone, the tree fell exactly where we planned. That was textbook."
5.AdjectiveLearned from, or as if learned from, a textbook, as opposed to personal discovery or experience."He has a textbook understanding of company law but no practical experience of litigation."