unanimous decision; decided by consensus
A yojijukugo used in formal or political contexts when a group reaches a decision with full agreement. Often seen in meeting minutes or news reports.
The bill was passed by unanimous decision.
The committee approved the new policy by consensus.
全会一致 is more common and neutral for 'unanimous agreement', while 衆議一決 is a formal yojijukugo emphasizing group deliberation and decision.
満場一致 also means 'unanimous', but is often used for votes or opinions in a meeting, whereas 衆議一決 stresses the decision-making process.
A yojijukugo composed of 衆 (many people), 議 (deliberation), 一 (one), and 決 (decide), literally meaning 'many people deliberate and decide as one'.