| Name | Description | Words defined |
|---|
| Wiktionary, large | Wiktionary is a collaborative dictionary that anyone can edit. It is a particularly large dictionary. The large version includes more information about many words, including etymology, pronunciation, and thesaurus information. The files for this dictionary are unusually large. | 1284214 |
| Wiktionary, concise | Wiktionary is a collaborative dictionary that anyone can edit. It is a particularly large dictionary. The concise version includes only definitions. | 1284214 |
| Wiktionary in simple English, large | Wiktionary is a collaborative dictionary that anyone can edit. The simple English version contains fewer words than the normal version, and definitions are written in more easily understood language. The large version includes more information about many words, including etymology, pronunciation, and thesaurus information. | 46391 |
| Wiktionary in simple English, concise | Wiktionary is a collaborative dictionary that anyone can edit. The simple English version contains fewer words than the normal version, and definitions are written in more easily understood language. The concise version includes only definitions. | 46391 |
| Webster's International Dictionary (1913 version) | Webster's International Dictionary (officially Webster's New International Dictionary) is a professionally-produced dictionary which is now in the public domain. Definitions in this dictionary will be more curated than those in collaborative versions such as Wiktionary, but definitions will use older language and modern words are not present. | 95802 |
| Basic English Thesaurus (from Wiktionary) | The thesaurus from Wiktionary is not as complete as the dictionary, but it generally provides synonyms, antonyms, and other related words for many common terms. | 2558 |