1 example sentence using valediction.
Valediction used in a sentence
Valediction in a sentence as a noun
Additionally, e-mail incurs a seemingly heavy time penalty to send -- some kind of greeting and valediction always must be present. On IRC, doing so is amounts to almost wasting everyone's time if you have an issue to bring up.
Valediction definitions
noun
a farewell oration (especially one delivered during graduation exercises by an outstanding member of a graduating class)
See also: valedictory
noun
the act of saying farewell