valedictory
From Longman Dictionary of Contemporary Englishvaledictoryval‧e‧dic‧to‧ry /ˌvæləˈdɪktəri◂/ noun (plural valedictories) [countable] formal GOODBYEa speech or statement in which you say goodbye when you are leaving a school, job etc, especially on a formal occasion —valedictory adjective a valedictory speechOrigin valedictory (1600-1700) Latin valedictus, past participle of valedicere “to say goodbye”, from vale “goodbye” + dicere “to say”