---
title: Query
slug: '231'
canonical_url: https://docs.coveo.com/en/231/
collection: glossary
source_format: adoc
---
# Query
A {doctitle} is a set of one or more expressions which are sent to a service such as an [index](https://docs.coveo.com/en/204/) to return matching relevant [items](https://docs.coveo.com/en/210/).