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Definer - Word Finder, Web Translator & PDF Dictionary

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Overview

Select text for a quick definition or translation. Powerful translation software and multilingual dictionary in one simple mouse…

Instantly define words and get translations with Definer, the ultimate word finder and dictionary extension for your browser. Boost your reading comprehension and language learning without ever leaving your current tab. Definer streamlines your workflow by providing a quick definition or translation in a clean popup bubble whenever you select text. It's a powerful AI language translator and vocabulary tool designed for students, professionals, and avid readers. Whether you're trying to understand figurative language in a novel or need a simple word translate, Definer is your all-in-one solution. This is the only translation extension you'll ever need for efficient online reading. 🚀 Key Features ✅ Instant Popup Dictionary: Select any word or phrase on a webpage to get an immediate definition or translation in a customizable popup. ✅ Powerful AI Assistant: Use the integrated AI source as a paraphrase tool, an AI grammar checker, or to get detailed explanations on any topic. ✅ PDF & EPUB Reader: Open local or web-based PDF and EPUB files directly in your browser to read and translate them with Definer's popup functionality. ✅ Fully Customizable Sources: Configure multiple sources at once. Use it as a Google Dictionary, search on Wikipedia, look up terms on DuckDuckGo, or even do a Bing image search. ✅ Text-to-Speech Pronunciation: Hear words and phrases spoken aloud to improve your pronunciation and listening skills. ✅ Specialized Dictionaries: Access an American Sign Language dictionary, get phonetic transcriptions with our IPA translator, and more. ✅ Offline Functionality: The AI, Custom, and Speech Synthesizer sources can work even without an internet connection. 💡 Your All-in-One Linguistic Extension Definer is more than just a dictionary. It's a comprehensive tool designed to make sense of the web. Perform a quick word search online or dig deep into complex subjects. Our goal is to provide the most efficient word searches and translation experience. 📚 Read PDF and EPUB Files with Ease Stop struggling with dense documents. Definer acts as a capable pdf translator by allowing you to open documents in its integrated reader. Select text inside the PDF just as you would on a normal webpage to get instant definitions and translations. It's perfect for academic papers, ebooks, and reports. 🤖 AI-Powered Productivity Unlock the power of AI right in your browser. Beyond being an AI dictionary, Definer’s AI source can act as an ai paraphraser to help you rephrase sentences or a grammar checker to polish your writing. Simply select text and choose your AI prompt to get started. 🌐 Connect to Your Favorite Services Make Definer your central hub for information. Configure it to search in Wikipedia, pull definitions from a dictionary in Google, or connect to any online dictionary or encyclopedia you prefer using the custom source feature. You can even configure a DuckDuckgo search or other search engines. 🗣️ For Language Learners and Enthusiasts Master new languages faster. Use the English to IPA translator to understand phonetics or look up the meaning of complex figurative language. With support for a multilingual dictionary setup, you can tailor Definer to your specific learning needs. ❓ Frequently Asked Questions • How do you search for a word on a page with Definer? Simply highlight any word or phrase with your mouse, and the Definer popup will appear instantly. It’s the easiest way to perform a word search on any page. • How do I search for a phrase on a website? Just like with a single word, you can select an entire phrase to look it up in your chosen search engine, dictionary, or translation source. • Can I use this as a PDF translator? Yes! Definer includes a built-in reader that allows you to open and translate PDF files directly in your browser. • Is this similar to the Google Dictionary extension? Definer offers everything you love about the Google Dictionary extension and adds much more, including an AI language translator, a paraphrase tool, support for PDF files, and the ability to add multiple custom sources. ⚠️ Troubleshooting If something isn't working properly, here's what you can try: - Restart your browser. This often fixes minor glitches. - Temporarily disable other extensions. They can sometimes conflict with each other. - Reinstall the extension. If all else fails, a fresh install might do the trick. Still having issues? Head over to the r/lumetrium_definer subreddit or seek support via email. Include screenshots of the issue if possible, as this might help resolve your problem more quickly. Be sure to mention which browser you're using. 📧 Contact & Community You can always leave a review if you have any thoughts or suggestions. If you'd like to chat, report a bug, or share ideas, come join our Reddit community: https://www.reddit.com/r/lumetrium_definer On Reddit, you can find release notes, see what features people are requesting, participate in discussions, and even get sneak peeks of upcoming updates before they launch. Want to reach out directly? You can email me (the author of this extension) at definer@lumetrium.com

Details

  • Version
    1.12.0
  • Updated
    September 9, 2025
  • Size
    6.99MiB
  • Languages
    55 languages
  • Developer
    Website
    Email
    definer@lumetrium.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Definer - Word Finder, Web Translator & PDF Dictionary has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

Definer - Word Finder, Web Translator & PDF Dictionary handles the following:

Personally identifiable information

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, please open this page on your desktop browser

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