Query Expansion
Definition
Query Expansion supplements search queries with appropriate additional terms.
The addition of related terms, spelling variants, or concepts to a search query to find additional relevant results.
Simply explained
A search for one word includes meaningful related words so that additional suitable results are found.
Why it matters in practice
The term improves reliable access to data and knowledge as well as their usable linkage in digital systems.
Example from business
"Notice period" is expanded with "contract end" and suitable synonyms.
Limits and pitfalls
- Reducing precision by using overly broad terms or ignoring domain-specific meanings.
Origin & history
Relevance Feedback and thesauri made Query Expansion a classic method of information retrieval.
Use in mid-sized companies
- Possible application: "Notice period" is expanded with "contract end" and suitable synonyms.
Frequently asked questions
What does query expansion mean?
Adding related terms, spelling variants, or concepts to a query to find additional relevant results. What mistakes should be avoided? Reducing precision by using overly broad terms or ignoring domain-specific meanings.
Sources
Source checked on 10.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: