Definitions.net
What is Definitions.net?
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Add-on summary
Definitions.net is a free multilingual dictionary that provides instant definitions from many respected reference resources such as the Random House College Dictionary, Princeton WordNet, Wiktionary, Webster Dictionary, U.S. National Library of Medicine, DOD Dictionary of Military and Associated Terms and more.
To use this extension simply select a word on any web page you're visiting and click on the extension icon. A pop-up window will open with all possible definitions for the selected word.
Note: The extension will not work in tabs that were open prior to installation. After installing this extension, either reload your open tabs or restart Firefox.
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated.- Finds definitions not listed in major dictionaries
- Useful and quite handy
- Provides pronunciation and example usage
- Good website for good answers
- Works great
- Interface not as convenient as expected
- Extension clutters toolbar
- The name of the extension is too long
- Issues with scroll bars within the extension
- Popup window can be cut off
- Provides uncommon definitions
- Issues with interface and toolbar clutter
- Scroll bar issues
Recent reviews
Add-on safety
Risk impact
Definitions.net requires a few sensitive permissions. Exercise caution before installing.
Risk likelihood
Definitions.net has earned a fairly good reputation and likely can be trusted.