A LDS term with a variety of meanings. Zion is where God dwells. Therefore, it can refer to (1) The Church of Jesus Christ of Latter-day Saints, (2) Utah, (3) Independence, Missouri (since they believe it is where Jesus will return and from where he will rule), or (4) a condition of the heart.
Dictionary of "Mormonese"
Stop talking past each other. Gain a better understanding of the words that are unique to Mormonism and the differences of shared terms between Mormonism and Christianity.