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EAR file:

An archive file that contains an enterprise application.

enterprise bean:

Shorthand for an Enterprise JavaBean (EJB).

Enterprise JavaBean (EJB):

A specification for a component model for building scalable, distributed server-based enterprise Java application components.

enterprise software:

Refers collectively to all software involved in supporting the common elements of an enterprise.

entity bean:

A type of EJB that encapsulates persistent data in a data store.

entity class:

Analysis level classes that represent information of significance to the system.

extend relationship in use cases:

A relationship used to model optional behavior for a use case.