/ Dictionary / Index P Parthia: Meaning and Definition of Find definitions for: Par•thi•a Pronunciation: (pär'thē-u), [key] — n. an ancient country in W Asia, SE of the Caspian Sea: conquered by the Persiansa.d.226; now a part of NE Iran. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: parthia (Thesaurus) parthenospore Parthian Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language