Data & retrieval
Semantic search
Search based on meaning rather than only matching exact words.
Definition
Semantic search compares query and content embeddings to retrieve conceptually related information despite different wording.
Why it matters
It improves discovery across policies and research but can return plausible yet irrelevant evidence that must be reranked and evaluated.
Related concepts
- Embedding
A numerical vector representing the meaning or features of an item.
- Reranking
Reordering retrieved results using a more precise relevance model.
- Retrieval-augmented generation
Generating answers using information retrieved at request time.