Plural of annotation: explanatory notes, comments, or marks added to a text, image, map, or other material to clarify or provide additional information.
From Latin 'annotatio' (a marking upon), the plural form '-iones' became '-ions' in English. The root 'annotare' (to write upon) comes from 'ad-' (to) and 'notare' (to mark).
Ancient Egyptian hieroglyphic texts are covered in 'annotations' written by later scribes—we can actually see the history of reading and interpretation layered in margins, proving that people have always wanted to talk back to texts.
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