valedictory

1. ADJ A valedictory speech, letter, or performance is one that is intended as a way of saying goodbye when someone leaves another person, a place, or a job. 告别的[正式] [usu ADJ n]

Mr. Walker made his valedictory address after two years as chairman. 在担任主席职务两年后，沃克先生发表了告别演说。

2. N-COUNT A valedictory is a speech that is given by the student with the highest marks in their class at their graduation ceremony. (顶尖毕业生)告别演说[美国英语] [oft N n]