/ Dictionary / Index P product line: Meaning and Definition of Find definitions for: prod'uct line" Pronunciation: [key] all of the products carried by a manufacturer, wholesaler, or retailer. a group of products of the same manufacturer having similar or related characteristics and intended for similar or related markets. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. product liability product mark Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language