/ Dictionary / Index P Persian Gulf: Meaning and Definition of Find definitions for: Per'sian Gulf' Pronunciation: [key] an arm of the Arabian Sea, between SW Iran and Arabia. 600 mi. (965 km) long. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Persian Empire Persian Gulf States 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