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.

• 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

Version 1.6.0

Privacy Statement Update

Ratings and Reviews

1.9 out of 5
12 Ratings
12 Ratings
sangyeij ,

Huge missed opportunity

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.

azoem ,

Money grab

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.

mike1900 ,


You charge over $50 for this app. It is nothing more than a digital version of the dictionary. You get this price because law students pay exorbitant prices for every other book that they buy anyways. Update it for the iPhone X, so that I can ACTUALLY SEE what I paid for.


Thomson Reuters
126.1 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Thomson Reuters Legal


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