Lexical Search
A search method that retrieves documents by matching query terms against exact words, tokens, or linguistic forms in indexed content.
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Related terms
Semantic Search
A search technique that analyzes sentence meaning and intent rather than matching literal keywords.
Hybrid SearchA retrieval technique that combines semantic vector search with keyword-based lexical search to improve the relevance, accuracy, and recall of retrieved information by leveraging the strengths of both approaches.
Dense RetrievalA retrieval technique that uses dense vector embeddings to identify semantically relevant documents based on similarity in an embedding space.
Sparse RetrievalA search technique that uses term frequency and keyword matching, such as BM25, to locate relevant documents within a corpus.