---
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/claude
---
# How to Look Up Definitions with Claude

Claude makes dictionary lookups the starting point of deeper word exploration. Define a word, then ask about its nuances in specific contexts, compare it against similar terms, and explore how it is used differently across fields like law, medicine, and everyday speech. Each follow-up enriches your understanding.

## Setup

claude mcp add toolrouter -- npx -y toolrouter-mcp

## Steps

1. Connect ToolRouter: claude mcp add toolrouter -- npx -y toolrouter-mcp
2. Ask Claude: "Define the word ephemeral using dictionary-words"
3. Claude returns the full definition with parts of speech and examples
4. Ask: "Use this word in three different sentences"
5. Understand the word in context

## Example Prompt

```
Define "ubiquitous" -- give me all meanings, part of speech, and example sentences.
```

## Tips

- Ask Claude to explain the difference between similar words
- Request definitions in the context of a specific field like law or medicine
- Combine with synonyms to find the best word for your writing
