Avestan Avesta • avian · · · Info · Definitions · Characters · · Avestan · · Text Latin · · Script 7 · · Length Definitions · · · (noun) an ancient Iranian language. Synonyms: Zend. · · Noun Definition 1 (noun) the script in which the ancient Persian language of the Avesta is written. · · Noun Definition 2 (adj) of or pertaining to the Avesta (sacred text of Zoroastrianism). · · Adjective Definition 1 Characters · · A latin capital letter a U+0041 a latin small letter a U+0061 e latin small letter e U+0065 n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074 v latin small letter v U+0076