By this definition, Adam and Eve, Moses, the various prophets, and archangels are all given the title of Saint.
Sainthood in the Orthodox Church does not necessarily reflect a moral model, but communion with God; there are many examples of people who lived in great sin and became saints by humility and repentance: Saints Mary of Egypt, Moses the Ethiopian, and Dismas, the repentant thief who was crucified with Jesus Christ.
Orthodox belief states that God reveals saints through answered prayers and other miracles.
The word canonisation means that a Christian has been found worthy to have his name placed in the canon (official list) of saints of the Church.
They are believed to be able to intercede for the living for salvation or other requests and help mankind either through direct communion with God or by personal intervention.