/ Dictionary / Index S Sining: Meaning and Definition of Find definitions for: Si•ning Pronunciation: (shē'ning'), [key] — n. Older Spelling. Xining. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sining (Thesaurus) sinigrin sinister Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language