/ ˈtekstbʊk; NAmE / noun , adjective
■ noun
( NAmE also text ) a book that teaches a particular subject and that is used especially in schools and colleges :
a school / medical / history, etc. textbook
■ adjective
[ only before noun ] used to describe sth that is done exactly as it should be done, in the best possible way :
a textbook example of how the game should be played