American Heritage Dictionary
(2)
Century Dictionary
(2)
GNU Webster's 1913
(2)
WordNet
(3)
Elsewhere on the web
All programmes except inaugural and valedictory will be organized in different colleges of the Amritsar namely Khalsa College, B.B.K. DAV College for women & Govt.— PunjabNewsline News
He wrote this lecture as a valedictory address on the occasion of his retirement from the University of Utrecht but faced pressure to omit the final section, included here: van der Horst explores the connections between the antiquity of the blood libel and contemporary antisemitism in the Muslim world.— TELOSscope: The Telos Press blog
Greed will be their valedictory, their epitaph, their message to the world, as, out of one job after another, they wave goodbye. the university— University Diaries

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word a few times a year.