/ Dictionary / Index K Kuiper: Meaning and Definition of Find definitions for: Kui•per Pronunciation: (kī'pur), [key] 1905–73, U.S. astronomer, born in the Netherlands. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: kuiper (Thesaurus) Kuibyshev Ku Kluxer Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language