A decision-making method determined by the majority; a majority vote or majority rule where the option with most votes is adopted.
会議では多数決で決めることになった。
It was decided that the meeting would make decisions by majority vote.
少数意見も尊重すべきだが、最終的には多数決で決まる。
Minority opinions should also be respected, but ultimately the decision is made by majority vote.
クラスの出し物は多数決で決められた。
The class activity was decided by majority vote.