sufficiently significant to affect the whole world; "earthshaking proposals"; "the contest was no world-shaking affair"; "the conversation...could hardly be called world-shattering"
of a speech expressing leave-taking; "a valedictory address"
of or relating to an occasion or expression of farewell; "a valedictory address"; "valedictory praise for his uniformly manly course"; "a suitable valedictory gesture"