‖n. The Zoroastrian scriptures; the sacred text of Zoroastrianism. See Zend-Avesta. [ 1913 Webster ]
a. Of or pertaining to the Avesta or the language of the Avesta. --
‖n. [ Properly, the Avesta, or sacred text, and its zend, or interpretation, in a more modern and intelligible language. W. D. Whitney. ] The sacred writings of the ancient Persian religion, attributed to Zoroaster, but chiefly of a later date. [ 1913 Webster ]