1. a person who adds explanatory notes or comments to a text, document, or other material

Examples

• The annotator added helpful footnotes to explain the historical references.
• Each annotator was assigned a different chapter of the manuscript to review.
• The digital platform allows multiple annotators to collaborate on the same document.
• As an experienced annotator, she could quickly identify key passages that needed explanation.
• The annotator’s comments helped students better understand the complex poem.
• Medical researchers hired annotators to label the data for machine learning purposes.