AMS(redirected from AMSS)
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(Government, Politics & Diplomacy) Additional Member System: a voting system in which some candidates are elected for geographic constituencies and others are elected by proportional representation using party lists. The voter has two votes: one for a party and the other for a candidate in a constituency
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014