Valedictorian

[,vælɪdɪk'tɔːrɪən] or ['vælədɪk'tɔrɪən]

解释:

(noun.) the student with the best grades who usually delivers the valedictory address at commencement.

乔迪校对--From WordNet

解释:

(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.

希拉里校对