Wiktionary
n. (context Zoroastrianism English) Avestan language name of the most sacred of the Gathic hymns of the Avesta, the revered texts of Zoroastrianism.
Wikipedia
Ahuna Vairya is the Avestan language name of Zoroastrianism's first of four Gathic Avestan formulas. The text, which appears in Yasna 27.13, is also known after its opening words yatha ahu vairyo. In Zoroastrian tradition, the formula is also known as the ahun(a)war.
Numerous translations and interpretations exist, but the overall meaning of the text remains obscure. The Ahuna Vairya and Ashem Vohu (the second most sacred formula at Yasna 27.14) are together "very cryptic formulas, of a pronounced magical character." The Ahunavaiti Gatha (chapters 28-34 of the Yasna), is named after the Ahuna Vairya formula.
Usage examples of "ahuna vairya".
The unconquerable weapon of victory was the sacred formula Ahuna Vairya, infallible like the Vedic hymns or the Hindu mantras.