ANNOTATION

annotation, annotating

(noun) the act of adding notes

note, annotation, notation

(noun) a comment or instruction (usually added); “his notes were appended at the end of the article”; “he added a short notation to the address on the envelope”

Source: WordNet® 3.1

Etymology

Noun

annotation (countable and uncountable, plural annotations)

a critical or explanatory commentary or analysis

a comment added to a text

the process of writing such comment or commentary

(computing) metadata added to a document or program

(genetics) information relating to the genetic structure of sequences of bases

Source: Wiktionary

An`no*ta"tion, n. Etym: [L. annotatio: cf. F. annotation.]

Definition: A note, added by way of comment, or explanation; -- usually in the plural; as, annotations on ancient authors, or on a word or a passage.

Source: Webster’s Unabridged Dictionary 1913 Edition