'Wilderness' in the Bible

Also I brought you up from the land of Egypt, and led you forty years through the wilderness, to possess the land of the Amorite.

Have ye offered unto me sacrifices and offerings in the wilderness forty years, O house of Israel?

But, behold, I will raise up against you a nation, O house of Israel, saith the LORD the God of hosts; and they shall afflict you from the entering in of Hemath unto the river of the wilderness.