Zend \Zend\, n. [See {Zend-Avesta}.] Properly, the translation and exposition in the Huzv[^a]resh, or literary Pehlevi, language, of the Avesta, the Zoroastrian sacred writings; as commonly used, the language (an ancient Persian dialect) in which the Avesta is written. [1913 Webster]
Avestan \A*ves"tan\, a. Of or pertaining to the Avesta or the language of the Avesta. -- n. The language of the Avesta (an ancient Iranian language); -- less properly called {Zend}. Syn: Zend [Webster 1913 Suppl.]