val·e·dic·to·ry /-ˈdɪkt(ə)ri/
 (a.)告別的告別詞


 Val·e·dic·to·ry a. Bidding farewell; suitable or designed for an occasion of leave-taking; as, a valedictory oration.


 Val·e·dic·to·ry, n.; pl. Valedictories  A valedictory oration or address spoken at commencement in American colleges or seminaries by one of the graduating class, usually by the leading scholar.

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 valedictory
      adj 1: of or relating to an occasion or expression of farewell; "a
             valedictory address"; "valedictory praise for his
             uniformly manly course"; "a suitable valedictory
             gesture"
      2: of a speech expressing leave-taking; "a valedictory address"
      n : a farewell oration delivered by the most outstanding member
          of a graduating class [syn: valediction, {valedictory
          address]