Justifiable, reasonable, or legitimate; based on correct procedure or valid grounds.
彼の行動には正当な理由があった。
There was a justified reason for his actions.
正当な手続きが行われたことを証明する書類を提出してください。
Please submit documents proving that the proper procedures were followed.
その判決は法律的に正当だと判断された。
The ruling was judged to be legally justified.