n.a farewell oration (especially one delivered during graduation exercises by an outstanding member of a graduating class)
同义词:valedictionvaledictory addressvaledictory oration
adj.
of or relating to an occasion or expression of farewell
"a valedictory address"; "valedictory praise for his uniformly manly course"; "a suitable valedictory gesture"
of a speech expressing leave-taking
"a valedictory address"