4def is a free Chrome add-on developed by Slidefuse Networks. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This program allows users to quickly select text on a webpage and define it with dictionary.com.

With 4def, users can easily and efficiently define any word or phrase they come across while browsing the web. The add-on seamlessly integrates with Chrome, providing a convenient way to access dictionary.com's extensive database of definitions.

This tool is designed to be user-friendly and intuitive, allowing users to select text with a simple click and instantly view its definition. Whether you're a student, a professional, or simply someone who loves to expand their vocabulary, 4def provides a quick and easy way to enhance your reading experience online.