/ Dictionary / Index P Philadelphia: Meaning and Definition of Find definitions for: Phil•a•del•phi•a Pronunciation: (fil"u-del'fē-u), [key] — n. a city in SE Pennsylvania, on the Delaware River: Declaration of Independence signed here July 4, 1776. 1,688,210. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: philadelphia (Thesaurus) philabeg Philadelphia lawyer Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language