'Uncut' in the Bible

You are to make the altar of the Lord your God of uncut stones; offering on it burned offerings to the Lord your God:

In the way ordered by Moses, the servant of the Lord, as it is recorded in the book of the law of Moses, an altar of uncut stones, untouched by any iron instrument: and on it they made burned offerings and peace-offerings to the Lord.

Then firing the sticks, he let the foxes loose among the uncut grain of the Philistines, and all the corded stems as well as the living grain and the vine-gardens and the olives went up in flames.

If men came to get your grapes, would they not let some be uncut on the vines? if thieves came by night, would they not make waste till they had enough?