'Valedictorian' definitions:

Definition of 'valedictorian'

From: WordNet
noun
The student with the best grades who usually delivers the valedictory address at commencement [syn: valedictorian, valedictory speaker]

Definition of 'Valedictorian'

From: GCIDE
  • 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. [1913 Webster]