To agree upon or decide (usually after discussion); to set terms (e.g., of a contract).
会議で来月の予算を取り決めた。
They decided next month's budget at the meeting.
契約の条件を双方で取り決める必要がある。
Both sides need to agree on the terms of the contract.
親同士で子どもの送り迎えの時間を取り決めた。
The parents agreed on the pickup and drop-off times for the children.