---
description: Definitions of key terms used in the Cloudflare Workflows documentation.
title: Glossary
image: https://developers.cloudflare.com/og-docs.png
---

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# Glossary

Last updated Sep 3, 2026|Copy as Markdown| [View as Markdown](https://641a99ee.previews.developers.cloudflare.com/workflows/reference/glossary/index.md)| [Agent setup](https://641a99ee.previews.developers.cloudflare.com/agent-setup/)

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

| Term | Definition |
| --- | --- |
| Durable Execution | "Durable Execution" is a programming model that allows applications to execute reliably, automatically persist state, retry, and be resistant to errors caused by API, network or even machine/infrastructure failures. Cloudflare Workflows provide a way to build and deploy applications that align with this model. |
| Event | The event that triggered the Workflow instance. A `WorkflowEvent` may contain optional parameters (data) that a Workflow can operate on. |
| instance | A specific instance (running, paused, errored) of a Workflow. A Workflow can have a potentially infinite number of instances. |
| step | A step is self-contained, individually retryable component of a Workflow. Steps may emit (optional) state that allows a Workflow to persist and continue from that step, even if a Workflow fails due to a network or infrastructure issue. A Workflow can have one or more steps up to the [step limit](https://developers.cloudflare.com/workflows/reference/limits/). |
| Workflow | The named Workflow definition, associated with a single Workers script. |

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