1. (

• notation ,
• notational_system

) a technical system of symbols used to represent special things ;

2. (

• note ,
• annotation ,
• notation ,

) 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" ;

3. (

• notation

) the activity of representing something by a special system of marks or characters ;