annotation
Annotation (noun) means a note added to a text, diagram or image to explain or comment on part of it. Example: “Her annotations fill every margin of the paperback.”
How to use annotation
Learner’s notesIn plain EnglishA note added to something to explain it.
Neutral; common in academic, publishing and technical contexts.
'Notation' means a system of symbols; 'annotation' means an explanatory note. They are not interchangeable.
Trace the full origin ↓Fill the gap
Can you complete this real example?
Her _____ fill every margin of the paperback.
Etymology
From Latin annotatio, from annotare 'to mark', from ad- 'to' and nota 'mark'.