さだsadaまるmaru
1.

To reach a clearly defined state or resolution in thoughts or policies, establishing certainty regarding a goal or direction.

2.

To achieve stability where one's physical position or posture remains unchanged, indicating a sense of balance or steadiness.

3.

To enter into a favorable and stable condition, characterized by calmness or tranquility, especially in varying circumstances such as weather or societal changes.

4.

To evolve into a customary practice or style, indicating an established standard or format within a given context.

Example:

やっと天候が定まった。