What is a thesaurus? Explain its functions. Describe the process of thesaurus construction.

A thesaurus in the context of Information Processing and Retrieval (IPR) is a structured vocabulary that organizes words, phrases, and concepts systematically to enhance information retrieval. It is primarily used to manage terminologies, establish relationships between terms, and improve search accuracy in databases, digital libraries, and search engines. A thesaurus ensures consistency in indexing and searching by standardizing terms and controlling synonyms, antonyms, and related concepts.

Functions of a Thesaurus

A thesaurus plays a crucial role in information retrieval by facilitating precise and relevant search results. Its main functions include:

1. Vocabulary Control – It reduces ambiguity by standardizing synonyms, homonyms, and variant spellings, ensuring consistency in indexing and searching.
2. Hierarchical Structure – It establishes relationships among broader, narrower, _________ _____ ____ ______ ______.
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