Valedictory
adjective
1.
bidding goodbye; saying farewell:
a valedictory speech.
2.
of or relating to an occasion of leave-taking:
a valedictory ceremony.
noun, plural valedictories.
3.
an address or oration delivered at the commencement exercises of a college or school on behalf of the graduating class.
4.
any farewell address or oration.
noun (pl) -ries
1.
a farewell address or speech
2.
(US & Canadian) a farewell speech delivered at a graduation ceremony, usually by the most outstanding graduate
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noun 1. See energy band
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noun, Chemistry. 1. an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom. valence electron An electron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms.