Strong's #4622: Sion (pronounced see-own')
 of Hebrew origin (6726); Sion (i.e. Tsijon), a hill of Jerusalem; figuratively, the Church (militant or triumphant):--Sion.
Thayer's Greek Lexicon:
 ́ 
 
  Siōn 
 
 Sion or Zion = "a parched place" 
 1) the hill on which the higher and more ancient part of Jerusalem was built
 
 1a) the southwestern most and highest of the hills on which the city was built
 
 2) often used of the entire city of Jerusalem
 3) since Jerusalem because the temple stood there, was called the dwelling place of God
 
  Part of Speech: noun proper locative
Relation: of Hebrew origin H6726
  Citing in TDNT: 7:292, 1028
 
Usage:
This word is used 7 times:
Matthew 21:5: "Tell ye the daughter  of Zion, Behold, thy king cometh"
John 12:15: "Fear not, daughter  of Zion; behold, thy King cometh,"
Romans 9:33: "Behold, I lay in  Zion a stumblingstone and rock"
Romans 11:26: "it is written, There shall come out of  Zion the Deliverer, and shall turn away"
Hebrews 12:22: "But ye are come unto mount  Zion, and unto the city of the living God,"
1 Peter 2:6: "Behold, I lay in  Zion a chief corner stone, elect, precious:"
Revelation 14:1: "on the mount  Zion, and with him a hundred forty and four thousand,"