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n.
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"
n.
a written explanation or criticism or illustration that is added to a book or other textual material; "he wrote an extended comment on the proposal"
n.
a record or narrative description of past events; "a history of France"; "he gave an inaccurate account of the plot to kill the president"; "the story of exposure to lead"