Definition - What does Websphere mean?
Websphere is both a technology and a brand of software, created by IBM, as a suite of business applications.
Websphere is meant to create business solutions through a set of Java-based tools enabling developers to create and manage business applications through a website's front end. Webshpere solutions are meant for high-volume, e-commerce transactions.
Techopedia explains Websphere
Using the application server, developers can connect users of a website to Java applications called servlets running on that server. These servlets are fast since all user requests are actually run on the same process space.
Websphere as a brand comes as packages for business organizations. For example, Websphere Portal is a business solution which already contains some business applications that run in the Java Enterprise platform (J2EE).
Underneath Websphere Portal is WAS, which without applications will do nothing by itself. Business organizations either have to purchase applications for WAS like Websphere Portal and Websphere Commerce or create their own.