This is the 11784th most frequent Russian word.
законное
"Lawful" or "legal."
In this sentence, 'законное' means 'legitimate' or 'lawful', referring to a right sanctioned by law or international agreement.
У каждой страны есть законное право на самоопределение.
Every nation has a legitimate right to self-determination.
Here, 'законная' signifies something legally owned or recognized, providing the adjective form of legality.
Этот дом — его законная собственность.
This house is his lawful property.
In this context, 'законное' describes the permission as being in accordance with law.