valedictorian /ˌvæləˌdɪkˈtorijən/ noun plural valedictorians
plural valedictorians
Learner's definition of VALEDICTORIAN
[count] US
: the student who has the highest grades in a graduating class and who gives a speech at graduation ceremonies(学校毕业典礼上)致告别辞的最优生 — compare salutatorian