Lookup Definitions Online

Lookup Definitions Online

Lookup free online dictionary and thesaurus sites for definitions.

  • Lookup Definitions Online
  • Lookup Definitions Online
  • Lookup Definitions Online
What is Lookup Definitions Online?
"Lookup Definitions Online" is a Chrome extension designed to give users instant access to a wealth of knowledge from respected dictionaries such as Cambridge and Oxford. This tool caters to avid readers, writers, and language learners who frequently seek clear, authoritative word definitions and synonyms. Users can highlight a word and quickly search across multiple dictionaries like Collins English Dictionary or Online Etymology Dictionary. The extension is user-friendly, easily customizable, and supports adding new dictionaries upon request to the developer, making it an invaluable addition to any browser.
By: pMan
Users: 6,000+
Rating: 4.60 (83)
Version: 2.2 (Last updated: 2024-03-30)
Creation date: 2019-10-20
Risk impact: Moderate risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 3
  • contextMenus
  • scripting
  • storage
Host permissions:
  • <all_urls>
Size: 283.65K
Stats date:

Other platforms

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Not available on Edge
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This extensions helps you easily lookup definitions of words in free online dictionaries/thesaurus.

Current version of the extension includes Cambridge Advanced Learner's dictionary, Oxford Advanced Learner's dictionary, Collins English Dictionary, Online Etymology Dictionary, and many more.

You may contact the developer if you wish to add a dictionary of your choice to this browser extension.

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Convenient
  • Broad choice of dictionaries
  • Easy to use
  • Useful
  • Great user interface
  • Some dictionaries don't work
  • Extra step of popout or additional tab
  • Not like the Google dictionary
  • Issues with self-removal from extensions list
  • Too many choices
Most mentioned
  • Very useful
  • Add Google Translate
  • Integration with Thesaurus: Synonyms 4 Right Click
  • Popup availability
  • Issues with self-removal from extensions list
Recent reviews
The one for investopedia doesn't work.
by Cedric (kuyaC) Cedric (kuyaC), 2020-02-08

I really, really would love to see the design of Thesaurus: Synonyms 4 Right Click (https://chrome.google.com/webstore/detail/thesaurus-synonym-4-right/lpkpcliecpgjbkffooidajhakoidhidh?hl=en) integrated with this database. I hate that this has an extra step of the popout or additional tab whereas the other one has a terrible database, but great user interface.
by E.L. Steinmetz E.L. Steinmetz, 2016-05-10

This is great, Now too easy to find some words without more typing. Thanks, pMan
by Jihyuk Bok Jihyuk Bok, 2015-02-25
View all user reviews
Risk impact

Lookup Definitions Online may not be safe to use and it requires some risky permissions. Exercise caution when installing this extension. Review carefully before installing.

Risk likelihood

Lookup Definitions Online is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this extension.

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