A·ves·ta (?-v?s?t?)n. The body of sacred writings of the Zoroastrian religion.[Short for Zend-Avesta.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Avesta (??v?st?) n (Other Non-Christian Religious Writings) a collection of sacred writings of Zoroastrianism, including the Songs of ZoroasterCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014A?ves?ta (??v?s t?) n. a collection of sacred Zoroastrian writings. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.