A weak entity is an entity that cannot be uniquely identified by its own attributes alone. Unlike regular entities, weak entities depend on a strong (or owner) entity for their identification. They do not have a primary key of their own and rely on a combination of their attributes and the primary key of the owner entity to form a unique identifier.

Characteristics of Weak Entities

• Dependent on Strong Entity: A weak entity is associated with a strong entity and relies on it for identification.