Oxford Dictionary English by-election noun noun BrE BrE//ˈbaɪ ɪlekʃn// ; NAmE NAmE//ˈbaɪ ɪlekʃn// (British English) Elections Add to my wordlistjump to other resultsan election of a new Member of Parliament to replace somebody who has died or left parliament compare general election See related entries: ElectionsCheck pronunciation: by-election oxfordlearnersdictionaries.com