Description: Ontology alignment is the process of matching concepts from different ontologies to enable interoperability between systems that use different representations of knowledge. This process is fundamental in the field of natural language processing (NLP), where the goal is for different information systems to communicate and understand each other despite variations in terminology and data structure. Ontology alignment involves identifying equivalences, relationships, and differences between concepts from different ontologies, allowing for the creation of a common framework for information exchange. This process not only enhances interoperability but also facilitates the integration of data from various sources, thereby optimizing the analysis and understanding of natural language. Alignment can be manual, where domain experts perform the matching, or automatic, using algorithms and machine learning techniques to identify similarities and relationships. In an increasingly interconnected world, ontology alignment becomes an essential tool for creating intelligent systems that can work together effectively, improving the quality and accuracy of NLP applications.