·

textbook (EN)
noun, adjective

noun “textbook”

singular textbook, plural textbooks
  1. a book used as a standard study of a subject, especially in schools and colleges
    She bought a new physics textbook for her university course.

adjective “textbook”

base form textbook (more/most)
  1. having the characteristics of a perfect or typical example
    The surgeon performed a textbook operation without any complications.