supermajority

(so̵̅o̅′per mə jôrə tē, -jär-)

noun

a specified number or percentage of votes, exceeding the minimum needed to produce a majority, required to pass certain legislative bills, ballot issues, etc.

See supermajority in American Heritage Dictionary 4

noun pl. su·per·ma·jor·i·ties
A specified majority of votes, such as 60 percent, required to approve a motion or pass legislation.
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