Cherubim (which is simply the plural of 'cherub') are representations of the power of God in the earth in the past and in the future. They are referred to many times as living creatures; for example the cherubim who guarded (or possibly 'showed'?) the way to the tree of life in the Garden of Eden (in Genesis 3:24), also the beings seen in vision by the prophet Ezekiel (Ezekiel 1), and also the living creatures seen by John, recorded in Revelation ch.4.
When Israel in the wilderness constructed the Tabernacle to God's design, a pair of golden cherubim were made and mounted over the ark of the covenant in the Most Holy Place (see Exodus 25:17-22), and they were similarly made and positioned in Solomon's Temple (see 2 Chronicles 3:10-13).

From the Bible record, it is not clear to us what form they take, but we are told that they have wings, and different faces, and possibly the bodies of oxen. Jewish tradition says that they are of human likeness, which may have helped to form the popular misconception of angels as winged humans. They are not to be confused with angels. Ezekiel saw the cherubim in the form of a chariot with wheels, and earlier the prophet Elisha had seen Elijah taken to heaven in a similar chariot (in 2 Kings 2:11-13), indicating the power of God in action.

They appear to be the same as 'seraphim' (q.v.), both words having a similar association of power, force, and destructive action.

Calling
Charity
Cherub
Child, Children
Christ
Christian
Church
Circumcision
Cloud
Coming again
Commandment
Communion
Confession
Congregation
Conscience
Contract or Covenant
  1. A Human Agreement
  2. Covenant: God's Will for Us
Creation
Creed
Cross
Crown
  1. of a King
  2. The Victor's Laurel Wreath
Crucifixion