/ Dictionary / Index S SINS: Meaning and Definition of Find definitions for: SINS Pronunciation: (sinz), [key] — n. a gyroscopic device indicating the exact speed and position of a vessel, as indicated by differences in positions over a given period on a given course, as well as the direction of true north. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sins (Thesaurus) Sino-Tibetan sinsemilla Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language