Overview
A better alternative to Google Definitions. 450K+ words from Definio, Oxford & Wikipedia with pronunciation and search history.
The English dictionary that lives in your sidebar. Look up 450,000+ words from three sources at once ā without leaving your page. No sign-in, no ads, no popups. š THREE WAYS TO LOOK UP WORDS Select any text on a webpage ā the definition loads automatically. Right-click and choose "Look up in Definio." Or press Alt+Shift+D to open the sidebar from anywhere. š TABBED SOURCES Switch between Definio's 450K+ word database, Oxford Dictionary, and Wikipedia with a single tap. Your last-used source is remembered. If a source has no result, it falls back automatically. š PRONUNCIATION Hear any word spoken aloud with built-in text-to-speech. Phonetic transcriptions shown alongside every definition. š SEARCH HISTORY Recently searched words are saved locally. Browse, re-search, or remove individual entries. Toggle on or off in settings. āļø FULLY CONFIGURABLE Show or hide definitions, examples, pronunciation, synonyms, and antonyms. Adjust font size. Switch between light and dark themes. ā” FAST & PRIVATE Lightweight, no tracking, no ads, no account required. Open the sidebar and start looking up words immediately. āØļø KEYBOARD SHORTCUT Alt+Shift+D (Windows/Linux) or Option+Shift+D (Mac). Customizable via chrome://extensions/shortcuts. Originally built as a better alternative to Google Definitions ā because the default dictionary lacked the depth and flexibility people wanted. ā ļø KNOWN LIMITATIONS - Does not work with PDF files viewed in the browser - Open the sidebar first, then select text ā or use the right-click menu
Details
- Version1.1.5
- UpdatedMay 11, 2026
- Size409KiB
- LanguagesEnglish
- DeveloperWebsite
Email
admin@definio.org - Non-traderThis 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
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