Legality: the quality or degree to which an act or decision conforms to the law; legal validity or legitimacy.
裁判ではその契約の合法性が最大の争点になった。
In the trial, the legality of that contract became the main issue.
行政処分の合法性を第三者が検証する必要がある。
A third party needs to verify the legality of the administrative action.
新しい政策の合法性について法律専門家に意見を求めた。
We asked legal experts for opinions on the legality of the new policy.