A system of characters, symbols, or abbreviated expressions used in an art or science or in mathematics or logic to express technical facts or quantities.
a technical system of symbols used to represent special things
a comment (usually added to a text); "his notes were appended at the end of the article"
the activity of representing something by a special system of marks or characters
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"
