We found 20 dictionaries that define the word Zarathustra:

General (17 matching dictionaries)

1. zarathustra: Longman Dictionary of Contemporary English
2. Zarathustra: Oxford Learner's Dictionaries
3. Zarathustra: American Heritage Dictionary of the English Language
4. Zarathustra: Collins English Dictionary
5. Zarathustra: Vocabulary.com
6. Zarathustra: Wordnik
7. Zarathustra: Wiktionary
8. Zarathustra: The Wordsmyth English Dictionary-Thesaurus
9. Zarathustra: Infoplease Dictionary
10. zarathustra: Dictionary.com
11. Zarathustra: Online Etymology Dictionary
12. Zarathustra (album), Zarathustra (disambiguation), Zarathustra (horse), Zarathustra: Wikipedia, the Free Encyclopedia
13. Zarathustra: Rhymezone
14. zarathustra: FreeDictionary.org
15. zarathustra: Mnemonic Dictionary
16. Zarathustra: TheFreeDictionary.com
17. Zarathustra: Who2

Art (1 matching dictionary)

18. Encyclopedia Mythica (No longer online)

Computing (1 matching dictionary)

19. Zarathustra: Encyclopedia

Miscellaneous (1 matching dictionary)

20. Encyclopedia of the Orient (No longer online)

(Note: See zarathustras as well.)

Definitions from Wiktionary (Zarathustra) ▸ noun:  Synonym of Zoroaster. Similar: Zoroaster, Hormazd, Ormazd, Ahura Mazda, Ohrmazd, Ahura, Mazda, Auramazda, Verethragna, Ahriman, more... Phrases: Also sprach Zarathustra, Thus Spoke Zarathustra, more... Adjectives: holy, pure, great, persian, wise, own, iranian, historical, knowest, original, nietzsche Colors:     gold,     orange,     red,     yellow,     white, more... ▸ Word origin ▸ Words similar to Zarathustra ▸ Usage examples for Zarathustra ▸ Idioms related to Zarathustra ▸ Wikipedia articles (New!) ▸ Popular adjectives describing Zarathustra ▸ Words that often appear near Zarathustra ▸ Rhymes of Zarathustra ▸ Invented words related to Zarathustra