extratextual
/ˌɛkstrəˈtɛkstʃuəl/
adjective
- Existing or occurring outside the written text; not contained in the actual words of a book, document, or other written work.
- The teacher asked students to consider extratextual factors like the author's biography when analyzing the poem.
- The critic argued that extratextual information about the historical period was essential to understanding the novel's themes.
- Many film adaptations rely on extratextual knowledge from the original book to fill in character backstories.