Aard Dictionary is a free, fast word lookup program.

dict.cc is a free, multilingual online dictionary. The site's database can also be downloaded and used offline.

Dictionary.com is an online dictionary platform.

Lingoes is a single-click multi-lingual translation software program released as a freeware translation utility.

QuickDic Offline Dictionary is an offline dictionary app.

StarDict is a free GUI released under the GPL for accessing StarDict dictionary files.

Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up, passive desktop notifications, regular expression based search,…

Apple Dictionary is an application a part of macOS. The application provides definitions and synonyms from various dictionaries, Wikipedia articles and a glos…

Google Dictionary was an online dictionary service of Google, originating in its Google Translate service.

Merriam-Webster is an online dictionary.

Reference.com is an online encyclopedia.

Wiktionary is a multilingual, web-based project to create a free content dictionary of all words in all languages.