abstract:In a relational database, a weak entity is an entity that cannot be uniquely identified by its attributes alone; therefore, it must use a foreign key in conjunction with its attributes to create a primary key. The foreign key is typically a primary key of an entity it is related to.
If you own stock in a company that is the object of one or more hostile takeover bids it could mean that it is viewed as financially weak and a good "buying" opportunity for a larger entity.