If the bell is roped around the neck of an animal in the dream, it means travel.
The bells of a church represent people one can seek their advice and follow their opinion. Bells in a dream also represent calling to prayers or preparing to meet one’s enemies, or they could mean the arrival of a caravan or a shipment. Bells in a dream also represent abrogated books of revelations or tampering with God’s revelations or they could represent past traditions.
(Also see Hand bell)