A more thorough explanation:

Dedition is when someone gives up something, like property, as a surrender.

• After losing the war, the country's dedition of their weapons was required.
• The dedition of the land was necessary for the construction of the new highway.

These examples show how dedition is the act of giving up something, in this case, weapons and land, as a surrender. It is often used in the context of war or legal agreements.