/ Dictionary / Index K Klein: Meaning and Definition of Find definitions for: Klein Pronunciation: (klīn), [key] — n. 1849–1925, German mathematician. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: klein (Thesaurus) Kleiber Klein bottle Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language