---
description: Definitions of terms used across Cloudflare Workers KV documentation.
title: Glossary
image: https://developers.cloudflare.com/og-docs.png
---

[Skip to content](#main-content)

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/kv/llms.txt  
> Use this file to discover all available pages before exploring further.

# Glossary

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/kv/glossary/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

Review the definitions for terms used across Cloudflare's KV documentation.

| Term         | Definition                                                                                                                                        |
| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| cacheTtl     | CacheTtl is a parameter that defines the length of time in seconds that a KV result is cached in the global network location it is accessed from. |
| KV namespace | A KV namespace is a key-value database replicated to Cloudflare’s global network. A KV namespace must require a binding and an id.                |
| metadata     | A metadata is a serializable value you append to each KV entry.                                                                                   |

Was this helpful?

YesNo

## On this page

[![](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/)

```json
{"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/kv/glossary/#page","headline":"Glossary · Cloudflare Workers KV docs","description":"Definitions of terms used across Cloudflare Workers KV documentation.","url":"https://developers.cloudflare.com/kv/glossary/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-08-24","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
```