/ Dictionary / Index P Pm: Meaning and Definition of Find definitions for: Pm Pronunciation: [key] — Symbol, Chem. promethium. pm. Pronunciation: [key] premium. P.M. Pronunciation: [key] Past Master. Paymaster. See Police Magistrate. Postmaster. post-mortem. Prime Minister. Provost Marshal. p.m. Pronunciation: [key] after noon. the period between noon and midnight. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pm (Thesaurus) Plzeň P marker Related Content Daily Word Quiz: hale Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language