And the Lord called his people a ZION, because they were of one heart and one mind, and dwelt in righteousness; and there was no poor among them. (Moses 7:18)

Zion is a term with broad significance in The Church of Jesus Christ of
Latter-day Saints. In addition to its Biblical meaning referring to
Jerusalem, Mormons see Zion more broadly as any city in which the people are unified and are "pure in heart," with no contention and no poor among them based on living the Law of Consecration.
In specific scriptural references, the term refers to the central physical location or city to which Latter-day Saints have historically gathered, which has included Kirtland, Ohio; Independence, Missouri; and Nauvoo, Illinois. In a more metaphorical sense, Zion represents a unified society of Latter-day Saints, unified under the law of consecration. Under this interpretation, one can strive to make even one's own home "Zion". Zion also refers to what Latter-day Saints generally
believe will be the New Jerusalem, a physical, millennial city expected to be headquartered in Jackson County, Missouri.

Source: Wikipedia.com