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majority group (party, faction)
多数派の意見が採択された。
The majority's opinion was adopted.
議会では多数派が政策決定の主導権を握る。
In the legislature, the majority holds the initiative in policy decisions.
多数派に属していれば安心だと思う人もいる。
Some people think they can feel safe as long as they belong to the majority.