Alternative words or phrases that have the same or similar meanings, used to broaden search queries and improve recall.
Synonyms are used in search systems to expand queries by including alternative terms that have similar meanings. This helps in retrieving more comprehensive results by considering different ways users might express the same concept.
Synonym expansion can be implemented using pre-defined synonym lists or dynamically generated using machine learning models. It involves mapping query terms to their synonyms and expanding the search query accordingly.