To reject (an MP) as constituency candidate at a forthcoming election.(verb)
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Use "deselect" in a sentence
"When someone votes a straight-party ticket but then also selects the name of a candidate within that party in a particular race, electronic machines "deselect" that candidate."
"· Add functionality to "deselect" an item (i.e. no item will then be selected)."
"Mine is doing the same thing ... scrolling won't work unless i "deselect" the picture when in split view mode."