The Collaborative International Dictionary of English v.0.48:

Zion \Zi"on\, n. [Heb. ts[imac]y[=o]n, originally, a hill.]
   [1913 Webster]
   1. (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.
      [1913 Webster]

   2. Hence, the theocracy, or church of God.
      [1913 Webster]

   3. The heavenly Jerusalem; heaven.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Zion
    n 1: 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; "the inhabitants of
         Jerusalem are personified as `the daughter of Zion'" [syn:
         Zion, Sion]
    2: Jewish republic in southwestern Asia at eastern end of
       Mediterranean; formerly part of Palestine [syn: Israel,
       State of Israel, Yisrael, Zion, Sion]
    3: an imaginary place considered to be perfect or ideal [syn:
       Utopia, Zion, Sion]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "Zion":
   Canaan, Celestial City, City Celestial, City of God, Civitas Dei,
   Cockaigne, Holy City, New Jerusalem, Shangri-la, arcadia, bliss,
   elysium, empyrean, fairyland, heaven, nirvana, paradise,
   promised land, wonderland



Easton's 1897 Bible Dictionary:

Zion
   sunny; height, one of the eminences on which Jerusalem was
   built. It was surrounded on all sides, except the north, by deep
   valleys, that of the Tyropoeon (q.v.) separating it from Moriah
   (q.v.), which it surpasses in height by 105 feet. It was the
   south-eastern hill of Jerusalem.

     When David took it from the Jebusites (Josh. 15:63; 2 Sam.
   5:7) he built on it a citadel and a palace, and it became "the
   city of David" (1 Kings 8:1; 2 Kings 19:21, 31; 1 Chr. 11:5). In
   the later books of the Old Testament this name was sometimes
   used (Ps. 87:2; 149:2; Isa. 33:14; Joel 2:1) to denote Jerusalem
   in general, and sometimes God's chosen Israel (Ps. 51:18; 87:5).

     In the New Testament (see SION) it is used sometimes
   to denote the Church of God (Heb. 12:22), and sometimes the
   heavenly city (Rev. 14:1).


Hitchcock's Bible Names Dictionary (late 1800's):

Zion, monument; raised up; sepulcher


U.S. Gazetteer Places (2000):

Zion, OK -- U.S. Census Designated Place in Oklahoma
   Population (2000):    48
   Housing Units (2000): 18
   Land area (2000):     1.714033 sq. miles (4.439326 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.714033 sq. miles (4.439326 sq. km)
   FIPS code:            83125
   Located within:       Oklahoma (OK), FIPS 40
   Location:             35.796881 N, 94.633765 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Zion, OK
    Zion


U.S. Gazetteer Places (2000):

Zion, IL -- U.S. city in Illinois
   Population (2000):    22866
   Housing Units (2000): 8036
   Land area (2000):     8.197166 sq. miles (21.230562 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    8.197166 sq. miles (21.230562 sq. km)
   FIPS code:            84220
   Located within:       Illinois (IL), FIPS 17
   Location:             42.453221 N, 87.840222 W
   ZIP Codes (1990):     60099
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Zion, IL
    Zion


U.S. Gazetteer Places (2000):

Zion, PA -- U.S. Census Designated Place in Pennsylvania
   Population (2000):    2054
   Housing Units (2000): 759
   Land area (2000):     13.088217 sq. miles (33.898324 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    13.088217 sq. miles (33.898324 sq. km)
   FIPS code:            87320
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             40.915741 N, 77.680467 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Zion, PA
    Zion