---
title: Glossary · Cloudflare Workers KV docs
description: Review the definitions for terms used across Cloudflare's KV documentation.
lastUpdated: 2024-08-13T19:56:56.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/kv/glossary/
  md: https://developers.cloudflare.com/kv/glossary/index.md
---

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. |
