Zion

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The historic land of Israel as a symbol of the Jewish people.
• noun The Jewish people; Israel.
• noun A place or religious community regarded as sacredly devoted to God.
• noun An idealized, harmonious community; utopia.

from The Century Dictionary.

• noun Figuratively, the house or household of God, as consisting of the chosen people, the Israelites; the theocracy, or church of God; hence, the church in general, or heaven as the final gathering-place of true believers: so called from Mount Zion, the holy hill of Jerusalem, the center of ancient Hebrew worship.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Jewish Antiq.) A hill in Jerusalem, which, after the capture of that city by the Israelites, became the royal residence of David and his successors.
• noun Hence, the theocracy, or church of God.
• noun The heavenly Jerusalem; heaven.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun A mountain in Israel on which Jerusalem is built.
• proper noun Jerusalem.
• proper noun metaphorical : The whole nation of Israel.
• proper noun A male given name of modern usage.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun Jewish republic in southwestern Asia at eastern end of Mediterranean; formerly part of Palestine
• noun originally a stronghold captured by David (the 2nd king of the Israelites); above it was built a temple and later the name extended to the whole hill; finally it became a synonym for the city of Jerusalem
• noun an imaginary place considered to be perfect or ideal