Comprehensive free thesaurus offering over 3 million synonyms and antonyms for precise language use with filters for relevance, length, and complexity, trusted worldwide for enhancing English language skills, and developed by Dictionary.com, LLC.

Treegle Dictionary is described as 'New kind of dictionary that arranges definitions in a tree format. With this format, you can see how each component of a definition contributes to the meaning of a word' and is a Dictionary in the education & reference category. There are more than 10 alternatives to Treegle Dictionary, not only websites but also apps for a variety of platforms, including Android, iPhone, iPad and Mac apps. The best Treegle Dictionary alternative is GoldenDict, which is both free and Open Source. Other great sites and apps similar to Treegle Dictionary are Wiktionary, WordReference, Dictionary.com and Lingoes.
Comprehensive free thesaurus offering over 3 million synonyms and antonyms for precise language use with filters for relevance, length, and complexity, trusted worldwide for enhancing English language skills, and developed by Dictionary.com, LLC.

Wordnik is an online English dictionary and language resource that provides dictionary and thesaurus content.Some of the content is based on print dictionaries such as the Century Dictionary, the American Heritage Dictionary, WordNet, and GCIDE.


The meaning and definition of 140.000+ words. Meaning Monkey is a free online dictionary. Can't find something? Take part in the enlargement of MeaningMonkey.org! Let's build the world's next favorite dictionary together.




Client/server software, human language dictionary databases, and tools supporting the DICT protocol (RFC 2229).
Dictionary .NET is a tiny, easy and smart multilingual dictionary translating from/to 65 languages using Googles and Bing services.






LookUp is an easy to use English dictionary app with beautiful Word of the Day illustrations and an award winning design to lookup all you want to know about about a word in a single search. It’s a great reading companion for avid readers, and a visual learning tool for kids...




LookUp is the most popular commercial alternative to Treegle Dictionary.