/ Dictionary / Index S service line: Meaning and Definition of Find definitions for: serv'ice line" Pronunciation: [key] the rear boundary of a service court. a line running parallel to the front wall in certain court games, as handball or squash, that marks a boundary of the service area. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. service flat serviceman Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language