Noun
qualified majority (plural qualified majorities)
(chiefly UK) A majority in a vote that reaches a preset threshold value significantly larger than 50%, such as ⁄3, often required instead of a simple majority for reaching a decision; particularly on important matters, such as modifying the bylaws of an association.
Synonym: (chiefly US) supermajority
Antonym: qualified minority
three-fifths qualified majority
two-thirds qualified majority