A corpus in the context of research refers to a collection of written or spoken texts that are used for linguistic analysis and computational processing. These texts can be from a variety of sources such as newspapers, books, speeches, and online content. Corpora are analyzed in order to study language patterns, syntax, semantics, and other linguistic features. They are also used in natural language processing tasks such as machine translation, information retrieval, and sentiment analysis. Corpora play a crucial role in advancing our understanding of language and improving computational models of communication.