/ Dictionary / Index P Phnom Penh: Meaning and Definition of Find definitions for: Phnom Penh Pronunciation: (nom' pen', pu-nôm' pen'), [key] a city in and the capital of Cambodia, in the S part. 400,000. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ph.M. -phobe 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