A key requirement for materializing the Semantic Web involves the annotation of resources and Web services with semantic metadata. This procedure is traditionally addressed as a manual task, which involves a high consumption of time and resources as well as the expertise on description formats and formal representations of knowledge, such as ontologies. Some research has promoted the development of mechanisms that partially automate the semantic annotation procedure, however, for the services particular case, those works lack of an analysis of the linguistic context of descriptor documents or interfaces, which provide adequate assignment of semantic annotations on the functional attributes of the services. In this context, this paper introduces a mechanism to automate the semantic annotation of SOAP services, supported by Word Sense Disambiguation techniques (WSD), from which it is possible to link the context of descriptor documents to the procedure of identification and association of ontological entities related to service attributes. This document discusses the mechanism described above, by developing an example, as well as the results of the experimental evaluation performed on a prototype that implements the proposal.