Valedictory, a.
Bidding farewell; suitable or designed for an occasion of leave-taking; as, a valedictory oration.
1 other Webster entry under this spelling
Valedictory, 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.
Shades of meaning
Fernald has no entry of its own for valedictory; he lists it under farewell.
Where he writes about it:
A valedictory is a public farewell to a company or assembly. — from farewell
Antonyms
none given