/ Dictionary / Index S side trip: Meaning and Definition of Find definitions for: side' trip" Pronunciation: [key] a brief excursion off the main route of an itinerary, as to visit a particular person or place. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sidetrack sidewalk Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language