To become settled or fixed; to reach a stable or determined state (for plans, opinions, conditions, etc.).
会議で日程がようやく定まった。
The schedule was finally settled at the meeting.
法律の解釈が定まらない問題がまだ残っている。
There remain issues where the interpretation of the law is not yet settled.
引っ越し先が定まるまで荷造りはしないつもりだ。
I don't plan to pack until the new place is decided.