Definition: OWL

(1) (Web Ontology Language) A comprehensive language that is used to define the vocabulary in an RDF data model. A superset of the RDFS language, every OWL document is an RDF document, but OWL Lite and OWL DL (OWL Description Logistics) are subsets (see RDFS).

Why Is This OWL Instead of WOL?
Because OWL sounds catchier and is also reminiscent of William A. Martin's One World Language project of the 1970s. See RDF, SPARQL and Semantic Web.

(2) (ObjectWindows Library) A class library of Windows objects from Borland that serves as an application framework for developing Windows applications in C++. It is the Borland counterpart of the Microsoft Foundation Class Library (MFC).