/ Dictionary / Index S syli: Meaning and Definition of Find definitions for: sy•li Pronunciation: (sē'lē), [key] — n. an aluminum coin and monetary unit of Guinea, equal to 100 cauris: replaced the franc in 1972. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sylacauga syll. 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