Last Updated：2025/11/22

The state or characteristic of being retroactive. / (law) The application of a law to events that took place before it was made.

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retroactivity

Source Word

retroactivity

Noun

uncountable usually

Japanese Meaning

遡及性（後ろ向きに適用される性質） / 法律が制定される前の事象にも適用されること

The retroactivity of the new tax law surprised many taxpayers.

新しい税法の遡及性は多くの納税者を驚かせた。

Sense（1）

The state or characteristic of being retroactive.

Sense（2）

(law) The application of a law to events that took place before it was made.

retroactivities

（ plural ）