/ Dictionary / Index Y Yasna: Meaning and Definition of Find definitions for: Yas•na Pronunciation: (yus'nu), [key] — n. Zoroastrianism. a part of the Avesta including the Gathas and other liturgical texts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Yasmin Yassy Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language