/ Dictionary / Index S spliff: Meaning and Definition of Find definitions for: spliff Pronunciation: (splif), [key] — n. Slang. a marijuana cigarette, esp. a large or very potent one. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spliff (Thesaurus) splicer spline Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language