Student center letter: "On behalf of the Admissions Committee, I regret to inform you that you were not selected to fill one of the available seats in the class. It was, however, recommended that your name be placed on a ranked waiting list. Should any of the selected candidates decline the seat we have offered them, replacements will be selected from applicants on the waiting list."
Admissions e-mail: "Any offers not accepted will be filled by individuals on the Wait List." (This is what I received when I inquired for waitlist ranking)