n. 致告别辞者,告别演说者

[ noun ]
the student with the best grades who usually delivers the valedictory address at commencement
<noun.person>

Valedictorian \Val`e*dic*to"ri*an\, n.
One who pronounces a valedictory address; especially, in
American colleges, the student who pronounces the valedictory
of the graduating class at the annual commencement, usually
the student who ranks first in scholarship.