---
title: ToolRouter — Agent Use Case Guide
description: Step-by-step guide for completing a task with a specific AI agent using ToolRouter.
url: https://toolrouter.com/tools/dictionary-words/use-cases/lookup-definitions/copilot
---
# How to Look Up Definitions with Copilot

Copilot verifies word meanings right in your editor, ensuring your documentation, code comments, and README files use terms correctly. Look up technical vocabulary, check whether a word carries the connotation you intend, and improve the clarity of your technical writing without switching to a browser.

## Setup

{"mcpServers":{"toolrouter":{"command":"npx","args":["-y","toolrouter-mcp"]}}}

## Steps

1. Add ToolRouter to Copilot MCP config
2. In Copilot Chat: "Define this word using dictionary-words"
3. Copilot returns the definition
4. Ask: "Is this the right word for my documentation?"
5. Improve your technical writing

## Example Prompt

```
Define "idempotent" -- I want to make sure I am using it correctly in our API documentation.
```

## Tips

- Great for verifying technical terms in documentation and comments
- Copilot can suggest better word choices for your writing
- Look up jargon to ensure your docs are accessible to a broader audience
