Русско-англо-русский юридический словарь

Electoral system, Method and rules of counting votes to determine the outcome of elections. Winners may be determined by a plurality, a majority (more than 50% of the vote), an extraordinary majority (a percentage of the vote greater than 50%), or unanimity. Candidates for public office may be elected directly or indirectly. (Britannica)

A voting system or electoral system consists of the set of rules which must be followed for a vote to be considered valid, and how votes are counted and aggregated to yield a final result. (Wikipedia)