Breadcrumb Home > Dictionary > Index C cay: Meaning and Definition of Find definitions for: cay Pronunciation: (kā, kē), [key] — n. a small low island; key. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cay (Thesaurus) Caxton Cayce ✖ Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language