---
title: Thesaurus
slug: '2742'
canonical_url: https://docs.coveo.com/en/2742/
collection: glossary
source_format: adoc
---
# Thesaurus
A {doctitle} is a [query pipeline](https://docs.coveo.com/en/180/) feature which consists of a set of synonym relationships.
These synonyms are defined to expand matching [keywords](https://docs.coveo.com/en/2738/) and improve findability.