The term MARK ON A STAFF is a musical notation that is used to indicate the pitch of a NOTE. It is represented by a symbol, usually a letter or number, placed on a staff. The four-letter solution for this term is NOTE. A NOTE is a sign used in musical notation to represent the relative duration and pitch of a sound. Notes are written on a staff, which consists of five lines and four spaces. Each line and space represents a different pitch. Notes can be placed on any line or space to indicate the desired pitch.