It's an application server
From
WebLogic Server 8.1 Features and Changes
Welcome to BEA WebLogic Server 8.1! As the leading application server, BEA WebLogic ServerTM implements J2EE 1.3 technologies, Web services, and other leading Internet standards to provide a reliable framework for highly available, scalable, and secure applications. WebLogic Server's seamless integration of disparate, heterogeneous platforms and applications enables your network to leverage existing software investments and share the enterprise-class services and data that are crucial to building mission-critical e-business applications.
From
Configuring Web Server Functionality for WebLogic Server:
In addition to its ability to host dynamic Java-based distributed applications, WebLogic Server is also a fully functional Web server that can handle high volume Web sites, serving static files such as HTML files and image files as well as servlets and JavaServer Pages (JSP). WebLogic Server supports the HTTP 1.1 standard