/ Dictionary / Index K kingcup: Meaning and Definition of Find definitions for: king•cup Pronunciation: (king'kup"), [key] — n. any of various common buttercups, as Ranunculus bulbosus, having bright-yellow flowers. the marsh marigold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: kingcup (Thesaurus) kingcraft king devil Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language