/ Dictionary / Index P Petrograd: Meaning and Definition of Find definitions for: Pet•ro•grad Pronunciation: (pe'tru-grad" Russ. pyi-tru-grät'), [key] — n. former name (1914–24) of(def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: petrograd (Thesaurus) petroglyph petrogram 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