1. notes or comments written in the margins of a book or manuscript
Usage: plural form; singular is marginalium, though rarely used

Examples

• The professor’s marginalia revealed his deep engagement with the text.
• Students often find marginalia in used textbooks helpful for understanding difficult passages.
• The scholar’s marginalia provided valuable insights into his interpretation of the work.
• Medieval manuscripts often contain fascinating marginalia by scribes and readers.
• Her marginalia consisted mostly of question marks and exclamation points.
• The library discouraged writing marginalia in borrowed books.