valedictory (Adjective) — Of or relating to an occasion or expression of farewell. ex. "a valedictory address" ex. "valedictory praise for his uniformly manly course" ex. "a suitable valedictory gesture"
valedictory (Adjective) — Of a speech expressing leave-taking. ex. "a valedictory address"
valedictory (Noun) — A farewell oration (especially one delivered during graduation exercises by an outstanding member of a graduating class).