/ Dictionary / Index P private-line car: Meaning and Definition of Find definitions for: pri'vate-line' car" Pronunciation: (prī'vit-līn'), [key] a freight car owned by a company other than a railroad but operated over the tracks of railroads. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. private law Private Member Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language