an open specification that has been developed by Microsoft for accessing both relational and nonrelational data. OLE DB interfaces can provide much of the same functionality that is provided by database management systems. OLE DB evolved from the Open Database Connectivity (ODBC) application programming interface.
A set of interfaces that exposes data from a variety of data sources using COM. OLE DB enables standards-based access to both relational and nonrelational data stores through reusable components. For detailed information on OLE DB, refer to the Microsoft programming documentation on OLE DB.
Object-Linking-and-Embedding Data Base. "A set of Component Object Model (COM) interfaces that provide applications with uniform access to data stored in diverse information sources and that also provide the ability to implement additional database services. [ OLEDB20: p.5