Black’s Law Dictionary 10th Ed
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Description
For more than a century, Black’s Law Dictionary® has been the gold standard for the language of law. Today, it’s the most widely cited law book in the world. By Editor in Chief Bryan A. Garner, the 10th Edition is the most comprehensive law dictionary ever published. It contains more than 50,000 terms, including more than 16,000 new definitions. Features • More than 50,000 terms, including 7,500 more terms than the 9th Edition • More than twice as many sources quoted and cited than the 9th Edition • Earliest usage dates in English-language contexts provided for nearly all terms – the only legal dictionary with this feature • More than 1,000 definitions of law-related abbreviations and acronyms • Trusted authority – every term has been reviewed for accuracy by nearly 300 attorneys from across the country • Pronunciation guidance, including audio pronunciations for over 7,000 terms • Thoroughly reviewed and edited Latin maxims, with 900 new maxims added New in the 10th Edition • “Did You Mean” search functionality o spell checker functionality provides alternative suggestions for misspelled search terms • Define in Black’s o define words within definition text by selecting a word and tapping Define in Black’s • Enhanced linking o link to subentries and cross-references from a search result, within a definition, and between definitions o link to Westlaw® content via the WestlawNext® iPad® app • Word of the Day o audio pronunciation available on all Word of the Day entries o link to full definition from Word of the Day tab o history slider on Word of the Day tab provides quick navigation to previous Word of the Day entries • History o track viewed definitions and sort by date or alphabetical order • Intuitive structure, formatted for easy reading and navigation
What's New
- iOS 13 Compatibility - General content updates and bug fixes
Details
- Developer
- Thomson Reuters
- Main Category
- Reference
- Version
- 1.7.0
- Version Release
- 2020-04-15
- Initial Release
- 2015-04-30
- Size
- 121 MB
- Age Rating
- 4+
- Price
- USD 54.99
- Languages
- EN
- Bundle ID
- com.thomsonreuters.legal.Blacks10th
- Version Rating
- ★ 2.83 (23)
- First Seen
- 2026-05-28
Metadata updated 2026-06-18
Rank History
Free · Max 90 days · Top 5 categories shown (Y-axis: rank, lower is better)
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Paid Rankings
Competitive Benchmark — Reference Top 10
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| 10 | Webster's 1828 Dictionary USA | USD 2.99 | ★ 4.86 | 211 | 1 | 2025-05-08 |
| 91 | Black’s Law Dictionary 10th Ed | USD 54.99 | ★ 2.83 | 23 | 1 | 2020-04-15 |
User Reviews
Despite the older negative reviews, I took a chance on this app, hoping it would save me from having to carry the actual dictionary to and from class. APP IS GREAT! I highly recommend it to any and all law students and attorneys. I only regret not giving it a chance sooner.
I actually had a good laugh over this. You have a legal definition for “Man” but you don’t have one for “Woman.” So basically for all the information you have your basically saying the professional by the book lawyer does not know what a woman is. Yet you have womens bureau and womens suffrage etc. So many things for this one type of person you can’t define. DO YOU HAVE ANY IDEA HOW STUPID THAT LOOKS? Sorry but for all your helpful information, you’re getting one star for that loophole. If you have any pride at all, get that fixed.
I found the Black’s Law Dictionary application as a 1L student. The app was an incredibly useful reference for new words, Latin phrases, abbreviations, and important documents. As a practicing attorney, I use it as a reference when writing briefs, when providing additional specificity to certain terms for clients, or to simply understand when other lawyers are trying to be sneaky when using outdated language.(i.e., what is a cognovit judgment?). As some other reviewers have pointed out, there is room for minor improvements to the app interface and functionality, but overall, it works and it is a reliable. Despite these other minor issues, I would give this app a 5 star review, but there has always been one issue that bothers me when using this app: if I have audio playing in a different application and switch to Black’s, the app causes the volume to lower slightly. I’m not sure if this was intended, as though perhaps we need slightly more focus when looking up a legal term and therefore the volume should be lowered? Nevertheless, this little feature, whether intended or not, has always bothered me. Other than that, it’s a wonderful app and I highly recommend it.
I’ve taught law at the college level for several years This is an excellent tool to look reliable definitions of legal term at a more that 50% discount over the hard cover version. I’ve warned students not to look up legal definitions on the internet because who knows what you get. Blacks is the industry standard. There is really no substitute. I’d be happy to pay $60 for an updated version rather twice as much for an updated version of the hard cover
This dictionary is overpriced. I suggest trying the free “Legal” dictionary first and if it does not meet your needs then download Black’s. I’ve been comparing definitions between the two and I am finding that the free dictionary provides similar and often more helpful definitions. Unlike the free app, Black’s is not always great at providing examples.
I love the app but please optimise it for iPad Pro on your next update. Thank you! :)
I bought the 9th edition of the Black’s and had to repurchase the app entirely when the developer pulled the 9th edition from the App Store. I contacted Apple and they were of no help stating that Apple had no control over the developer pulling the content from the store. I did not follow up with Thompson as I had spent enough time on the issue with Apple. It’s a frustrating issue because had I bought the 9th edition book in print, I still would have access to the content.
The content is great and I feel the app is well designed. But much of the screen on the top and bottom is just black and therefore is not used for content. Were this fixed, the reading experience would be far superior.
This app is a massive missed opportunity. A mobile version of Black's could be indispensable for lawyers and students and easily justify the asking price. This app has not been updated to meet basic expectations (like iPhone X support), and more importantly it lacks vital functionality like generating BB citations or even just giving citable page numbers. As a student, $60 is a significant amount to spend on an app. I wouldn't regret it if the app met such modest expectations, but it does not.
I had the 9th edition app, which has been just as expensive, but they just disabled it. Instead of offering an upgrade at a reasonable price, they just put this one out. At full price even for those of us who had the previous version.
Reviews are collected only for apps with detected changes (new entries or sharp risers).