What does « East / Rising (sun) » mean in the Quran?

And to Allah belongs the east and the west. So wherever you [might] turn, there is the Face of Allah. Indeed, Allah is all-Encompassing and Knowing.

The foolish among the people will say, "What has turned them away from their qiblah, which they used to face?" Say, "To Allah belongs the east and the west. He guides whom He wills to a straight path."

Righteousness is not that you turn your faces toward the east or the west, but [true] righteousness is [in] one who believes in Allah, the Last Day, the angels, the Book, and the prophets and gives wealth, in spite of love for it, to relatives, orphans, the needy, the traveler, those who ask [for help], and for freeing slaves; [and who] establishes prayer and gives zakah; [those who] fulfill their promise when they promise; and [those who] are patient in poverty and hardship and during battle. Those are the ones who have been true, and it is those who are the righteous.

Have you not considered the one who argued with Abraham about his Lord [merely] because Allah had given him kingship? When Abraham said, "My Lord is the one who gives life and causes death," he said, "I give life and cause death." Abraham said, "Indeed, Allah brings up the sun from the east, so bring it up from the west." So the disbeliever was overwhelmed [by astonishment], and Allah does not guide the wrongdoing people.

And We caused the people who had been oppressed to inherit the eastern regions of the land and the western ones, which We had blessed. And the good word of your Lord was fulfilled for the Children of Israel because of what they had patiently endured. And We destroyed [all] that Pharaoh and his people were producing and what they had been building.