The Hebrew term refers to the irrevocable giving over of things or persons to the Lord, often by totally destroying them.
You are to gather all the plunder of the town into the middle of the public square and completely burn the town and all its plunder as a whole burnt offering to the LORD your God. That town is to remain a ruin forever, never to be rebuilt,
and none of the condemned thingsb are to be found in your hands. Then the LORD will turn from his fierce anger, will show you mercy, and will have compassion on you. He will increase your numbers, as he promised on oath to your ancestors—