SelectON — selection popup. Copy & Search
Workflow & Planning
Customizable popup with actions on text selection
Users
7K
Rating
4.8
Reviews
122
7D Growth
0|0%
Cooling signalUnknownHigh-risk permissions
Definer - Word Translator, Ask AI, Dictionary Extension
Select text to translate, define, or ask AI. A word translator and dictionary extension for webpages, PDFs, and EPUBs.
Users40KCurrent public install base
Rating4.8Store average score
Reviews389Public review volume
Manifest versionV3Extension platform version
7-day growth-10KNet users gained this week
7-day growth rate-20%Relative weekly velocity
Preview
7 assetsDefiner - Word Translator, Ask AI, Dictionary Extension Media preview
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Start
4.78
Latest
4.78
7-day rating change
0.00
2026年7月14日2026年7月20日
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Version1.16.2
ManifestV3
Size7.12MiB
Languages55Deutsch / English / English (Australia) +52
Published
Store updated
Last crawled
DeutschEnglishEnglish (Australia)English (United Kingdom)English (United States)FilipinoIndonesiaKiswahiliMelayuNederlandsTiếng ViệtTürkçe
Overview
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Stop interrupting your reading flow to switch tabs just to define a word or translate a phrase. Definer is a powerful word finder and browser extension that brings the dictionary directly to you. Whether you are reading a complex article, studying a foreign language, or just need a quick synonym, this tool acts as your personal reading assistant.
Simply select any text on a webpage to instantly trigger the popup bubble. Unlike a basic Google Dictionary extension, Definer integrates multiple data sources, allowing you to use it as a paraphrase tool, an encyclopedia searcher, or a translation hub. It streamlines how you consume content online, making it the perfect solution for anyone wondering how to search for a phrase on a website without losing their place.
🚀 Key Features
✅ Instant definitions with zero clicks—just select the text to see meanings
✅ Built-in AI paraphraser to help rewrite sentences and understand context
✅ Support for EPUB files to help you read ebooks in the browser
Reviews
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Store average score4.8Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.7Average computed only from synced review bodies below
Reviews with text299Synced review bodies
Total ratings / reviews389Chrome Web Store public rating/review count
Store average score: 4.8. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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Sleek and responsive, with shiny UI, highly customizable. Been using it for 2 day, so far so good. My only gripe, the *Google Dictionary Phonetics* option only provides BrE pronunciations, which I'm not a huge fan of. I would give it a 5 stars if AmE pronunciations are added in future.
This is the best dictionary that I used especially when I am reading pdf book. Thank you very much!
This is too good. i have no words to share my excitement. I am really thankful to you. Can I get same thing for the kindle app on my laptop or the browser version of kindle?
Great addition But it should be a solution to the problem Google Translate: "Too many requests" Please try again later. ERR_BAD_REQUEST (429)"
Excellent!!!!
You should make your PDF Reader just a little bit stable and standard in terms of design and functionality then implement the system to work as the default PDF reader like Adobe Acrobat: PDF edit, convert, sign tools or a lot like Google Scholar PDF Reader and afterwards, any PDF opened via Chromium and Gecko will be opened in your Definer - Popup Dictionary & Translator PDF Reader. (Then there will be an option to be enabled called 'Allow access to file URLs' in the Manage extension section.).
Finally! A good instant dictionary app on Chrome. The others are horrible in different ways. This is the one that did NOT disappoint.
Upon first launching I was not keen on how it looked as I found it rather obtrusive, but as I went into Definer Options and explored how customizable it was I'm absolutely delighted with it: setting the layout size at 275px by 750px alone was such a game changer! I also created a much darker theme that suits Chrome's night mode better (to my taste) and rearranged both the content and audio sources. There's really so much room for adapting it to cater exactly to what you need that I'm just so really pleased and feeling sorry for not having read more about how it worked. Looking forward to an increase in the maximum amount of languages it yields results in (which is currently 2). Thanks to the developer both for this great extension and for being so cool and kind and receptive
Its currently not working on opera gx. can you fix it?
Muito bom. Mas senti falta de uma IA para auxiliar no aprendizado...