I. ˈteks(t)-ˌbu̇k noun
Date: 1779
: a book used in the study of a subject: as
a. : one containing a presentation of the principles of a subject
b. : a literary work relevant to the study of a subject
II. adjective
Date: 1905
: of, suggesting, or suitable to a textbook ; especially : classic
a textbook example of bureaucratic waste