Definitions.net is a free Chrome extension designed to provide users with instant dictionary definitions for any selected word or term while browsing the web. It sources definitions from multiple esteemed reference resources, including the Random House College Dictionary, Princeton WordNet, and Wiktionary, among others. This tool is particularly useful for enhancing vocabulary and understanding complex terms encountered online.

To utilize the extension, users simply select a word on any web page and click the extension icon. A pop-up window will display all relevant definitions for the chosen word. It is important to note that the extension requires reloading open tabs or restarting Chrome to function properly after installation, as it will not work in tabs that were already open beforehand.