'Fields' in the Bible

But he shall let go the living bird out of the city into the open fields, and make an atonement for the house: and it shall be clean.

But the houses of the villages which have no wall round about them shall be counted as the fields of the country: they may be redeemed, and they shall go out in the jubile.

And if a man sanctify unto the LORD a field which he hath bought, which is not of the fields of his possession;