/ Dictionary / Index P postal storage car: Meaning and Definition of Find definitions for: post'al stor'age car" Pronunciation: [key] a railroad car for transporting unsorted mail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. postal stationery postal union 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